my acount was empty since yesterday, 3 years of xp, skins, sounds, nothing left... is there a way to fix that ?

Uhm, looking at your activated, you have stuff activated, and checking your trade history you sent all the items to a user called "jenfrude", evidence here.

Is this some kind of "scam" attempt? To make staff feel bad for you and send you items?

Looking at your trade history all of your items indeed seem to be sent to a user called jenfrude, and everything is now in possession of a user named weedbruh.

If you didn't sent these items to jenfrude yourself you can open a scam report here: http://forum.toribash.com/forumdisplay.php?f=518
Provide evidence if you can and they will be able to help with this problem.

Closing.