Where do I start? I damaged a wire under a plaster...

Where do I start? I damaged a wire under a plaster board in the wall. Just nicked the insulation. The electrician (?) turned up, dug a huge hole in the wall and eventually (after lots of chat) got himself into the second charging period before so that the original quote would be doubled. At which point he suggested I pay hi subcontract firm and the Able group individually. And as part of his double priced service, he mixed up resin on my table and wrecked the service. If that's your thing - go for Able.