Improper Format ? (?)

i was in a trade server today and someone called dr.jonasflint+ asked if he could see all of my hats, i showed him them he asked for only one of my hats so i took every other hat and misc out, he put in his offer, i liked it, we traded, next thing i know in the chat box it says he has also taken 4 other hats out of my backpack and that they were traded away http://steamcommunity.com/sharedfiles/filedetails/?id=100837651 after asking him for my hats back he must have got fed up or something, gave one of them back and left the server, he must have changed his name because when i searched for him on the community his name wasnt there so now im screwed because i cant show the account and that makes me really sad, it took me forever to trade/find the hats and he just takes them with a simple hack.

ps : proof he hacks, look in the chat: http://steamcommunity.com/sharedfiles/filedetails/?id=100837680&insideModal=1

forgot to mention, he also said he would only give me hats back if i gave him my unusual, also i have a eye witness called [GJFF] PopcornPig

might want to use the proper format, it will really help you to get him marked. Also your going to need some screenshots, ans detailed ones. Proper Format here:
http://forums.steamrep.com/threads/...-look-at-acceptable-format-before-posting.51/

i included screenshots, the links go to them and i still cant find the scammer/hacker

Look in your inventory history and look for the trade showing the items in question going to the scammer, this way you can find out his profile and as mentioned above post it in the correct format