Tabard gone

I have spent 2 coins on Battle Tabard of the Defilers and its suddenly gone from my character, you can check my marketplace history and i have few screenshots wearing it. I did not delete it for sure i never took it off, why would i? Can you return it to me? My transmog looks very bland now. I've made a ticket and GM said i should send them some kind of ID, if they meant item ID, its 20131. Cognoscere is the GM that responded to my ticket.

https://imgur.com/a/EVaT43Z
https://imgur.com/a/O8sE6sP
https://imgur.com/a/pBrpPG6

Yours sincerely, Luxxar.

Open support in your account section on the website then create ticket with "item missing" category then pick tabard from the list.