A Rouge Working On My Patch!

Not sure what i can really do about it , but i’m gonna have a rant anyways! So i get a phone call form a woman just before Christmas asking for a second opinion on a quote shes been given. So i go out there and the guy has “written off” her Whirlpool fully integrated d/w because the heaters gone. He says it would cost over £200. But when i get there the wooden panel is back on but the entire top fascia including the pcb board is missing?!! So i asked the lady for his number to ask him for it back. He answers and i explain who i am and what i want. But his reply is that he can’t really remember and has already thrown it away! (bearing in mind he only went there a few weeks ago) I quizzed him on why he had taken the board and fascia off to which his reply was “erm i can’t remember”. I also asked him did he turn the power off. To which his reply was “i don’t remember”. So i get out my meter and take off the front (after turning off the ring main for the kitchen sockets as i didn’t have much confidence in his ability’s ) I tested the mains in and it was still live!! He had left the machine LIVE with the wires dangling inside the lower metal door!! So i rang him privately in my van and asked him what the hell he was playing at and why 1: why had he taken the board in the first place (i suspect to use on another job) And 2: why had he not un-pluged the m/c to which his reply was “well i couldn’t reach the plug as it was behind the machine…” at that point i’d had enough and told him he was a disgrace! and hung up lol . The worst thing was was that he charged the woman £50!.