Calor vs G.B.C: most-reported complaints compared
Most-reported issues at Calor and G.B.C, according to reviewers on Trustpilot — classified by our automated reader and backed by verbatim quotes from distinct reviews. This is a side-by-side of what reviewers report, not a score, rating or recommendation for either company.
Calor
TrustScore 4.7 · 26,732 reviews on Trustpilot.
1,743 reviews analysed, 2026-06-08 to 2026-11-12.
Complaint rate (recent window): 6%
100% of negative reviews get a company reply.
“We also need communication in advance about a delivery so as to unlock a farmer’s gate which has not happened”
G.B.C
TrustScore 4.2 · 1,309 reviews on Trustpilot.
200 reviews analysed, 2019-12-23 to 2026-01-09.
Complaint rate (recent window): 58%
0% of negative reviews get a company reply.
“I lost £2000 and promised 10 years of annual boiler installation as care/repair service.”
Reported on both
Issues with an evidenced category (at least two verbatim quotes) on both sides.
| Issue | Calor | G.B.C |
|---|---|---|
| Support unhelpful | 22% | 13% |
| Support unreachable | 18% | 52% |
| Poor core service | 10% | 12% |
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. Figures are census classifications, not official statistics, and reflect what reviewers reported — not findings of wrongdoing by either company. Not affiliated with, endorsed by, or sponsored by Trustpilot A/S, Calor or G.B.C.