Invalid I got a false report along time ago

Hello

Along time ago i got reported as a scammer i just now realize this after i get back into the trading community that is TF2 i have no reelection of how it happened but i do know one thing this guy i think reported me i was little , and he wanted to scam me for a hat i would not let him and he said he will report me as a scammer , thinking it was i joke i shrugged it off now i am trying to become more better (at trading) and i cant because the guy that reported me got me banned on alot of sites that i need to trade on. Please send me the evidence against me and if it is true i accept all punishment but really i changed.