Just talked to him and he posted screenshots of your chat, and that's not at all what happened. Apparently you agreed that he would only have to pay you if he liked your design's concept. You sent him the design and he asked you to edit some **** and would pay you, and you told him you were busy and you would be back during the weekend. However you did not make the mods he wanted and just started posting this stuff. You should really learn to work your contracts, if you don't like having to do work before getting paid, request payment upfront, don't go around ruining people's rep because you don't know how to freelance properly.