help me pls

[Dimitri]

hello ladies and gentlemens, this(iSmiithy) guy yesterday offer me 10 dollars wallet code for an awp worm god (with stickers) and a famas valence, i was o it was a good price and i aceppt the offer, after that the guy says to me he buy a 15 dollars wallet by accident, i was okay this looks suspicous but he have my skins, i have to make the deal, i give him in compensation all my cases and one trash skin, then the guy gives me a used code, blocked me and making is profile privated, first of all i trusted in him because there was people in his profile that says +rep good trader, and i say to me "okay this guy have good reputation i will trust in him", if anybody knows how to help me, i will really apreciate it (sorry for my english i speak spanish XD)
http://steamcommunity.com/profiles/76561198212334579/ his profile
https://plus.google.com/+Smiith his google+
https://www.youtube.com/user/WNTRSociety his youtube channel (it has 769 suscribers without a video thats suspicous)