i suggest for you starfish, hall and perry

to gather as much information as you can about that ad, and your account like your steam id, ect. of you account that got hackked and sumbit this situation to STEAM and maybe call them or somthing i unno

but i strongly suggest for saftey reason to change your passwords on other sites like face book and you email ect.

you all spent great amount of money via steam there is always away to get it back

good luck all

edit: i feel like other people and my self are at risk
and i would hate to see our commuinty go down because of this hacking jack ass