Stolen puck wings

[Mavic]

I was trading with him - http://steamcommunity.com/profiles/76561198050179279/

There were puck wings (mine) for courier and 16 keys, everything was okay and real, we accepted the trade and... No trade complete, but steam error, I have no my wings anymore, he has his all items back, I lost my wings. I tried to check does he have my wings, there was no wings in his inventory, but he might trade it fast to his mate or friend. Can anybody help me?
The trade was today about 60 mins ago.