C
CMairiD
For me, the pertinent question is why didn't you ask for the Gas Safe card before work commenced? Asking for it afterwards is a bit like closing the barn door after the horse has bolted. And if there were no installation faults, would you have asked for the card at all?
By all means report them, but next time: no card, no work.
By all means report them, but next time: no card, no work.