@TheArtistFormerlyKnownAsSTR, are you looking for CIS guys or permanent? If it’s permanent, I’d be keen to chat to you. Got my C&G 2330, NVQ L3, 17th and just finishing my 2394/95 Inspection and Testing.
Like Tymbian says, get a report written up and then make a complaint against him to Gas Safe too. Crap tradesmen really piss me off, especially crap gas engineers.