Don’t know how they got my number and I’ve received over 200 calls in 3 days. They won’t stop bombarding me non stop with calls. This is abusive and harrassment. I may now need to get a new phone numb... See more
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See what reviewers are saying
As other comments have suggested, this is a UK-based company that provides numbers to scammers (some located abroad and some within the UK). A quick google search shows that their mother company Ga... See more
An Indian-accented lady phoned saying she’s from O2 and wants to upgrade my account. I’m not even with O2 anymore so I knew straight away it was scam but people who are might be tricked. I played alo... See more
Scammer called from 0204 641 7709 (A gamma owned number) claiming to be from virgin media / o2, I know these are scam calls not from Gamma themselves but one of their customers, but surely they must... See more
Company replied
Company details
About Gamma
Written by the company
Gamma is a leading provider of Unified Communications as a Service (UCaaS) into the UK, Dutch, Spanish and German business markets, supplying communication solutions directly and via our extensive network of trusted channel partners.
Of course, sometimes customers may need to reach out due to any issues they may have experienced - we encourage customers to contact us to resolve these issues promptly. Please click the link at the bottom to raise a general complaint about our products or services, and we will be happy to look into it.
Regarding scams and nuisance calls, we are Ofcom registered, fully compliant with regulations and we take the misuse of our numbers very seriously. Gamma is a business-to-business (B2B) wholesaler for number ranges to thousands of businesses across Europe. Therefore, it can appear that Gamma is making calls to the general public or able to control who uses them - this is not the case. Our numbers are being, at times, misused by other businesses, or non-Gamma numbers are ‘spoofed’ to make it appear as though Gamma is calling when this is not the case.
With that being said, we want to help clamp down on nuisance calls in any way we can. Therefore, we would be happy to investigate any reports to check the current owner of the numbers and can act where applicable if they are ours. Instead of leaving reviews, we would kindly ask that you provide the details of the numbers that have called you, including timestamps with our Misuse team. It helps to provide the number that received the call so we would ask that you complete the form via the link at the bottom. Our Misuse and Fraud teams can then investigate the situation.
However, if you do not want to contact us further, we would suggest reporting the numbers to the police, via www.actionfraud.police.uk or call 0300 123 2040 (if in England, Wales or Northern Ireland). If in Scotland, report to Police Scotland by calling 101.
Contact info
Kings House, RG14 5BY, Newbury, United Kingdom
- 03330140000
- https://www.gamma.co.uk/support/complaints
- gammagroup.co
2.0
Poor
86 reviews
No recent history of asking for reviews
This company hasn't invited customers recently, so reviews may not be representative
Replied to 52% of negative reviews
Typically replies within 1 week
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See how their reviews and ratings are sourced, scored, and moderated.
I'm an AI business founder and I ran…
I'm an AI business founder and I ran into hitch with Gamma that needed to be addressed. I can't tell you how many companies I will do my best to avoid working with if I'm locked in a loop with ai support agents. I understand policies on speaking to someone live isn't as easy as you'd think so when you have a company that encourages their human support teams (even if its email) to follow policy but also be human and use logic/some common sense, it gives me hope. Kael was responsive, understood the situation, and helped get me onto the right plan with a fair resolution. Thank you Gamma for encouraging your teams to use common sense. It will bless you down the road. Thanks! -DS
March 9, 2026
Unprompted review
Reply from Gamma
Hello Dawson,
Thank you for taking the time to share your experience and for the kind words.
We understand how frustrating it can be when support feels impersonal or difficult to navigate, so it’s great to hear that Kael was able to step in, understand the situation and help find a fair resolution. We’re proud of our teams for balancing process with common sense, and feedback like this reinforces how important that approach is.
I’ll be sure to pass your comments on to Kael and the wider team.
Thanks again and we wish you every success!
Best regards,
The Gamma Social Media team
Gamma scammer
Can I use many phone numbers be very careful if you get a phone call from them they were try and talk you into all sorts they fail on one thing say Heating costs they move over to card machines be very careful
March 6, 2026
Unprompted review
Reply from Gamma
Hello Pete, and we're sorry to hear about your experience.
Are you able to provide the call details? If so, we can pass these to our Misuse team to identify the source.
We will investigate any breaches by our customers. Unfortunately, we are also seeing a surge in call centres 'spoofing' Gamma's numbers to mislead recipients, making it hard to track the source. This means in those cases that non-Gamma numbers are being used to commit acts of fraud, while falsely appearing as one of our numbers.
We encourage you to register your numbers with the Telephone Preference Service to avoid unsolicited calls.
If you receive unwanted calls, you have options based on the type of call:
1. For "Silent and Abandoned Calls," contact Ofcom at 0300 123 3333.
2. For "Sales and Marketing" calls despite being registered with TPS, reach out to the Information Commissioner at 0303 123 113.
Both organisations can assist you with your complaint. If you’d like to discuss this further, please contact us at Misuse@gamma.co.uk with relevant details.
Failing the above options, we would recommend alerting the police (if in England, Wales or Northern Ireland, visit www.actionfraud.police.uk or call 0300 123 2040. If in Scotland, report to Police Scotland by calling 101).
Kind regards
Steve
The Gamma Social Media team
Yet another scam call from this…
Yet another scam call from this company, stop calling me!!
February 25, 2026
Unprompted review
Reply from Gamma
Hello Rob, and we're sorry to hear about your experience.
Are you able to provide the call details? If so, we can pass these to our Misuse team to identify the source.
We will investigate any breaches by our customers. Unfortunately, we are also seeing a surge in call centres 'spoofing' Gamma's numbers to mislead recipients, making it hard to track the source. This means in those cases that non-Gamma numbers are being used to commit acts of fraud, while falsely appearing as one of our numbers.
We encourage you to register your numbers with the Telephone Preference Service to avoid unsolicited calls.
If you receive unwanted calls, you have options based on the type of call:
1. For "Silent and Abandoned Calls," contact Ofcom at 0300 123 3333.
2. For "Sales and Marketing" calls despite being registered with TPS, reach out to the Information Commissioner at 0303 123 113.
Both organisations can assist you with your complaint. If you’d like to discuss this further, please contact us at Misuse@gamma.co.uk with relevant details.
Failing the above options, we would recommend alerting the police (if in England, Wales or Northern Ireland, visit www.actionfraud.police.uk or call 0300 123 2040. If in Scotland, report to Police Scotland by calling 101).
Kind regards
Steve
The Gamma Social Media team
This company is allowing scammers to…
This company is allowing scammers to also use their lines and doing nothing about this I keep getting calls and it comes back to this company and they don't care
November 8, 2025
Unprompted review
Reply from Gamma
Hello Amanda, and we're sorry to hear about your experience.
Are you able to provide the call details? If so, we can pass these to our Misuse team to identify the source.
We will investigate any breaches by our customers. Unfortunately, we are also seeing a surge in call centres 'spoofing' Gamma's numbers to mislead recipients, making it hard to track the source. This means in those cases that non-Gamma numbers are being used to commit acts of fraud, while falsely appearing as one of our numbers.
We encourage you to register your numbers with the Telephone Preference Service to avoid unsolicited calls.
If you receive unwanted calls, you have options based on the type of call:
1. For "Silent and Abandoned Calls," contact Ofcom at 0300 123 3333.
2. For "Sales and Marketing" calls despite being registered with TPS, reach out to the Information Commissioner at 0303 123 113.
Both organisations can assist you with your complaint. If you’d like to discuss this further, please contact us at Misuse@gamma.co.uk with relevant details.
Failing the above options, we would recommend alerting the police (if in England, Wales or Northern Ireland, visit www.actionfraud.police.uk or call 0300 123 2040. If in Scotland, report to Police Scotland by calling 101).
Kind regards
Steve
The Gamma Social Media team
No basic manners at all.
Called my work line and asked to speak to the director. When told he was unavailable, the caller said he would send an email and just hung up? Is that rudeness really how you want to represent your company? On that basis alone I won’t be doing business with these people at all.
September 25, 2025
Unprompted review
Reply from Gamma
Hello Amy, and we're sorry to hear about your experience.
Can you provide the call details so we can investigate this? Our teams rely on echat through our website for sales leads, so we would like to establish whether this was a Gamma call or a reseller using a Gamma number.
Kind regards
Steve
The Gamma Social Media team
Unauthorized porting
I am writing this review to express my deep concern and frustration regarding a serious breach of customer care and service by Gamma telecom.
Since 14th July 2025, our business landline has been non-functional due to an unauthorized porting of our number by Gamma telecom . This action was taken without our knowledge or consent, and has left our business completely disconnected from clients and partners for nearly four weeks.
only after extensive investigation on our part did BT informed us that Gamma telecom had illegally ported our number.
This prolonged disruption has caused severe operational and reputational damage to our business.
August 1, 2025
Unprompted review
Reply from Gamma
Hello, and thank you for providing your feedback - we're sorry to hear about this issue and the frustration it has caused. We would like to investigate this further, but we will need more details from you. Can you contact our Complaints team via complaints@gamma.co.uk, and we can then resolve this as urgently as possible.
Kind regards
Steve
The Gamma Social Media team
Absolute shambles of a network
Absolute shambles of a network. I have to use them as part of a corporate package with my employer and it’s like returning to the Stone Age. Just spent another day unable to take or make any calls. Complete waste of space.
June 25, 2025
Unprompted review
Reply from Gamma
Hello Phil, thank you for your feedback and we're sorry to hear of your negative experience with our network. We've passed on your comments to our back-end team to review for any issues affecting the network at this moment. Hopefully, this is a temporary issue and we can resolve this quickly.
Kind regards
Steve
The Gamma Social Media team
If a REAL business leave a voicemail!!
Gamma Telecom Holdings
Been seberal of these in the last week.
Fortunately I use Truecaller to sheild myself.
Feb 13th - 13th THREE calls
0161=537-9195
12/02/25 13:27 & 13:28 no vmail
13/02/25 16:38 no vmail
Both blocked by Truecaller
Most of them have been the short 5-6 rings to grab attention.
This also means they never left a voice mail.
EDITED: 16:48
Thanks for the contact Gamma.
I did realize that the number was fake.
I do tend to inform the provider when I can, as I know it is one of their customers numbers being abused.
February 13, 2025
Unprompted review
Reply from Gamma
Hello and we're sorry to hear of your experience. We want to clarify that Gamma, a wholesale telecommunications network, is not making these calls.
Thank you for providing the call details - we have now passed these to our Misuse team to identify the source.
We will investigate any breaches by our customers. Unfortunately, we are also seeing a surge in call centres 'spoofing' Gamma's numbers to mislead recipients, making it hard to track the source. This means in those cases that non-Gamma numbers are being used to commit acts of fraud, while faked to appear as one of our numbers.
We encourage you to register your numbers with the Telephone Preference Service to avoid unsolicited calls.
If you receive unwanted calls, you have options based on the type of call:
1. For "Silent and Abandoned Calls," contact Ofcom at 0300 123 3333.
2. For "Sales and Marketing" calls despite being registered with TPS, reach out to the Information Commissioner at 0303 123 113.
Both organisations can assist you with your complaint. If you’d like to discuss this further, please contact us at Misuse@gamma.co.uk with relevant details.
Failing the above options, we would recommend alerting the police (if in England, Wales or Northern Ireland, visit www.actionfraud.police.uk or call 0300 123 2040. If in Scotland, report to Police Scotland by calling 101).
UPDATE - Our Misuse team have advised there is discrepancies with their call traffic for this number as they can see no calls were made after 15:13 on 13/02 so this is likely a spoofed non-Gamma number faked to appear as a this number.
They have asked if you can provide the details via https://gammagroup.co/support/nuisance-and-scam-calls/ so they can investigate further with the called number showing. If they can see that the calls on 12/02 were to your number then it will be one of our reseller's customers that have been calling you.
We hope this context helps you going forward,
Kind regards
Steve
The Gamma Social Media team
I Would Highly Recommend Gamma
The whole team at Gamma are extremely helpful and friendly.
It's always very easy contacting interacting with Gamma.
The team at Gamma always go above and beyond to help us with any questions or queries we have, no matter how small.
I feel that Gamma values our business and they have made an effort to make sure they understand what we do and how they can help our business do better.
It feels like, to Gamma it's never just business and they always think about us as individuals and people.
Our account manager is fantastic (Alex Davidson) and they always do more than expected to make sure we're making the most of Gamma's products and services, but also succeeding as a business.
January 13, 2025
Reply from Gamma
Hello Matthew, thank you for providing this excellent feedback for our teams - especially Alex! We're pleased you have had a very positive experience as the relationships with our customers and partners is incredibly important to Gamma. We're delighted to pass over this great feedback to Alex and our teams. Thank you for taking the time to write this review!
Kind regards
The Gamma Social Media Team
Reply from Gamma
Hello Julie, and thank you for providing this lovely feedback! We're delighted you have had a very positive experience with our support team. Our work supporting our valued partners and customers is incredibly important to us and it's fantastic to pass on this great feedback to our teams. Thank you for taking the time to write this review!
Kind regards
The Gamma Social Media Team
Reply from Gamma
Hello Steven, and thank you for providing this wonderful feedback for our team! We're delighted that you have had a very positive experience and it's fantastic to pass on this great feedback to them. Thank you for taking the time to write this review!
Kind regards
The Gamma Social Media Team
Great customer service and support when you need it
Robbie Lesiak and Rebecca the porting manager were amazing when we had a critical issue when migrating our services and porting our numbers.
The service from Gamma is always outstanding but they went above and beyond
As a provider they are a breath of fresh air and would recommend.
December 19, 2024
Reply from Gamma
Hello, and thank you for providing this excellent feedback for Robbie and Rebecca We're pleased you have had a very positive experience with our teams and that you would recommend us. Our work supporting our valued partners and customers is incredibly important to us and it's fantastic to pass on this great feedback to Robbie, Rebecca and our teams. Thank you for taking the time to write this review!
Kind regards
The Gamma Social Media Team
Supplier to telecoms resellers.
Gamma Telecom is well organised and resourced to support our telecoms business. Online platforms and processes are well designed to enable us to carry out day to day tasks. Like all big companies Gamma suffers from a lack of flexibility but there are plenty of other suppliers in the market where we can source products & fill any gaps.
December 19, 2024
Reply from Gamma
Hello Martin, and thank you for providing this great feedback! We're delighted that you have had a positive experience with our platforms and processes and we look forward to continue supporting your business going forward.
Kind regards
The Gamma Social Media Team
Steve was incredibly helpful in a very…
Steve was incredibly helpful in a very tricky situation.
December 18, 2024
Reply from Gamma
Hello Mark, and thank you for providing this excellent feedback for Steve! We're pleased you have had a very positive experience with our teams. Our work supporting our valued partners and customers is incredibly important to us and it's fantastic to pass on this great feedback to Steve. Thank you for taking the time to write this review!
Kind regards
The Gamma Social Media Team
Great and responsive team
Great and responsive team. Very good service around the clock. Staff is very helpful.
November 29, 2024
Reply from Gamma
Hello Michael, and thank you for providing this lovely feedback! We're delighted you have had a very positive experience with our teams. Our work supporting our valued partners and customers is incredibly important to us and it's fantastic to pass on this great feedback to our teams. Thank you for taking the time to write this review!
Kind regards
The Gamma Social Media Team
Always willing to help
December 10, 2024
Reply from Gamma
Hello, and thank you for providing this lovely feedback! We're delighted you have had a very positive experience with our teams. Our work supporting our valued partners and customers is incredibly important to us and it's fantastic to pass on this great feedback to our teams. Thank you for taking the time to write this review!
Kind regards
The Gamma Social Media Team
Portal login issues
Portal login issues, constantly getting errors when try to program Horizon builds frequently even unable to log in.
December 10, 2024
Reply from Gamma
Hello Lee, and thank you for providing this feedback. We are sorry to hear of your negative experience with the portal and Horizon logins. We will feed this back to our development teams to review.
Kind regards
The Gamma Social Media Team
Just an excellent supplier and partner
Gamma has consistently been a supportive and reliable supplier. Their support team are second to none and work diligently on our behalf to ensure the best outcome for the end user.
December 12, 2024
Reply from Gamma
Hello Roger, and thank you for providing this lovely feedback! We're delighted to hear that you have had a great experience with our support team. Our work supporting our valued partners and customers is incredibly important to us and it's fantastic to pass on this great feedback to our teams. Thank you for taking the time to write this review!
Kind regards
The Gamma Social Media Team
Reply from Gamma
Hello Serban, and thank you for providing this lovely feedback! We're delighted you have had a very positive experience with our agent. Our work supporting our valued partners and customers is incredibly important to us and it's fantastic to pass on this great feedback to our teams. Thank you for taking the time to write this review!
Kind regards
The Gamma Social Media Team
"Outstanding Service and Innovation…
"Outstanding Service and Innovation from Gamma Communications"
At Albion Business, we pride ourselves on delivering exceptional services to our clients, and partnering with Gamma Communications has been a key factor in achieving this. From day one, Gamma has impressed us with its professionalism, technical expertise, and unwavering commitment to supporting our needs.
December 12, 2024
Reply from Gamma
Hello Phil and thank you for providing this fantastic feedback. We value all our partner interactions and we're delighted that you have had a positive experience with Gamma's teams. We will pass on your lovely comments and we look forward to continuing to support your business!
Kind regards
The Gamma Social Media Team
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