INFEMUS HAKER "4CHAN"

I just got scammed by one of those multi account things with a fake mod and everything. I'm new to the trading scene, so I don't really know what I should do at this point. I already did the whole reporting part and all that, and it seems the most I can do is get them banned as a consolation prize. Any advice on what I should do? I would show some screenshots, but they kicked and blocked me as soon as the deal was done.