They said they would send me a revised invoice, but they’ve narked me now. They were blatantly going to break the law to fleece me of more money than legally allowed. Companies like that deserve nothing.
I’ve also asked for an itemised bill of all work carried out. They didn’t like that. They probably only sent a letter or two.
Well I guess you can check citizens advice or moneysaving experts forum but if you agreed to use their services and they charge you the legal maximum (plus VAT) then you might not have much of a basis for complaint.
Why did you even bother using one of these cowboy firms? They're not required at all.