My helm dissapeared not a rollback

The helm dissapeared off my charecter. It cant be a rollback because i have had the helm for days. The charecter in question is named Trang-Oul and the helm was Trang-Ouls guise. now im screwed and my set is incomplete. please advise or help me out blizz.

Sorry for your loss.
I lost all my stuff… Blizzards bugs/issues were at fault and when I tried to get them to take any responsibility… They told me nupe. So it’s just gone gone… Sorry.