Improper Format Unusual scammer

Hi all. Please help me. Someone loged on my steam and steal my unusual hat - Unusual Sultans Ceremonial (effect: bubbling). I think someone hack my profile or see my password via web. Please back me my unusual.
http://www.tf2items.com/item/894153548
See my history trade.
http://www.tf2items.com/id/nikpos/
This is person who sold my hat.

Hello, your report seems to be improperly formatted and we cannot proceed with it in it's current state.

As such I'll reject it until you remake yours, please read the guidelines here: http://forums.steamrep.com/threads/...-look-at-acceptable-format-before-posting.51/

Thank you!