Nostalrius Begins - Quality wow vanilla realm (1.12)

My Onyxia attunement neck [Drakefire Amulet] is deleted or lost. All what i know is that i set neck after quest chain on bank. Today when i want to do Onyxia Lair with my guild i cant eneter. I check all bags and bank but i cant find it.
Acc name: miiden
caracter: Hazard

Just go back to winterspring and ask the girl for another one.

I go there but nothing, i cant speak to she.