Are you really do trade with him? Sorry for your lose, take it a lesson for the next time.
That's user has been tagged and flagged from many DT members, and you should aware about it before trade with him
You should understand both trust feedback  and trust flag in this forum
Stay away from user has get negative trust and flagged or DWYOR


Usually user get banned if he is caught plagiarism or use alt account when he's main account get banned (ban evasion). Scammer not get banned if he not do that, only get negative trust and flagged