Invalid help D: scammers name(Nagato yahiko and Konan) isnt on steam rep. but on steam D: he took my items

the scammer was selling a strangifier. so i offered him items. He said after a test run he will give. But then he ran off and called me asswipe. Please help.
He took my dead cone and batters helm.

more evidence

Nagato

is anyone going to help? and because heisnt on steam rep ive had trouble finding his ID. But he is on Steam

Hey there, i'm here to assist you as much as i can, please look at the proper format. Here's the link : http://forums.steamrep.com/threads/...-look-at-acceptable-format-before-posting.51/