Declined ([ŠħõŤ] Василёк)

I trade with player ([ŠħõŤ] Василёк), and when both sides agreed he used bug "new Steam Trade" and put the thing (vintage killers kabuto), which suggested that, I did not notice it (Kabuto's icon left) and clicked "Trade"
He says that he is innocent and has given all things
he's id http://steamcommunity.com/id/ololosh23
my bp http://steamcommunity.com/id/wantedinside/inventory/ (i still not have kabuto )
screenshot my bp history:

thanks for reading, and i'm wait for help

scammer return my items, sorry, pls close post

Confirmed. The Kabuto was given.