I was scammed around 250+ by one of your users

Scottywitty is a scam artist. After sending him 1 steam code he said it didn't work. I sent him another and it magically worked. When I was going to finish paying for the account I bought a physical steam code and scratched it off. I sent him the code and he acted like it had already been used. He doesn't accept any other form of payment because he claims he has been screwed over before. I have way more logs in discord to make sure this guy gets banned and no one else gets scammed. I tried to buy his E7 account. I have given him negative feedback with a more detailed explanation and I have reported him. I thought this was a safe place to trade, but I guess there are people like this everywhere.