G.B.C: most-reported complaints
Automated analysis of 200 public Trustpilot reviews published 2019-12-23 to 2026-01-09. TrustScore 4.5 from 1,308 total reviews — see the Trustpilot page. Quick answer: is G.B.C legit? Issues below reflect what reviewers reported, not findings of wrongdoing.
Reviewers most often report that customer support is unreachable, accounting for 52% of the 117 complaints identified in the 200 reviews analyzed. Warranty disputes are the second most common issue, cited in 29% of complaints, with reviewers noting that service plans are not being honored. Other concerns include reports that the company does not exist and difficulties in getting service, while faulty products represent 18% of the complaints.
Trustpilot lists this business as no longer collecting reviews. New reviews are not currently being gathered for its profile. See the Trustpilot page for the current status.
The company claimed its Trustpilot profile on 2017-12-14. We last checked this profile on 2026-09-24 and found 0 new reviews. These are facts Trustpilot publishes about the profile, as of our last harvest.
Severity: 74% of this company’s 117 graded complaints were classified as severe (money lost, an essential service cut off, or a problem unresolved for months). See the harm index.
35% of its 69 recent 5★ reviews came from accounts that had written only that one review when we captured it (the median across companies is about 39%). A high share is a reason to look closer, not evidence of fake reviews.
Sector benchmark: support unreachable makes up 52% of this company’s complaints vs a 20% median across 94 ranked companies in its sector.
Review velocity: 1 of this company’s 1,308 Trustpilot reviews (0%) were written in the last 12 months.
What are the most common complaints about G.B.C?
Support unreachable
61 reports · 52% of complaintssteady“I lost £2000 and promised 10 years of annual boiler installation as care/repair service.”
1 reader marked this review helpful on Trustpilot.
“Company took money. No way to contact them as they are bust.”
1 reader marked this review helpful on Trustpilot.
“The engineer did not turn up on the first day of installation”
Warranty disputes
34 reports · 29% of complaintsrising since 2021-02“Why were customers not informed that they have closed and our service plans are not going to be honoured?”
2 readers marked this review helpful on Trustpilot.
“The engineer did not turn up on the first day of installation”
“He hasn't honoured the 10 year plan many bought”
Other
25 reports · 21% of complaintsrising since 2021-02“company doesn't exist and I can't get my service done”
“no way to contact them what a load of sharks they are”
“Valente encouraged the selling of 10 year service policies knowing fully well that his company would never honour these contracts.”
1 reader marked this review helpful on Trustpilot.
Faulty product
21 reports · 18% of complaintsfalling“water tank and boiler were left behind after we were quotef for it”
2 readers marked this review helpful on Trustpilot.
“The engineer did not turn up on the first day of installation”
“their work caused a flood from my ensuite shower through my living room ceiling”
Support unhelpful
15 reports · 13% of complaintsfalling“The workman ship was poor and shoddy, customer service terrible”
1 reader marked this review helpful on Trustpilot.
“their work caused a flood from my ensuite shower through my living room ceiling”
“have recently been informed it has been fitted incorrectly 18 months later”
Poor core service
14 reports · 12% of complaintsfalling“Why were customers not informed that they have closed and our service plans are not going to be honoured?”
2 readers marked this review helpful on Trustpilot.
“The workman ship was poor and shoddy, customer service terrible”
1 reader marked this review helpful on Trustpilot.
“they caused damage whilst installing, we had two subsequent leaks, the flue is installed dangerously and they just keep telling us they are dealing with it”
1 reader marked this review helpful on Trustpilot.
Method: reviews are classified into a fixed complaint taxonomy by an automated reader; every category shown is backed by at least two verbatim quotes from distinct reviews. Trends are computed from dated review counts only. Negative reviews are deliberately over-sampled for evidence depth; headline percentages use an unbiased recent sample only. Report updated 2026-08-18.