Didn't get the item even though I bought it

As the title says: I've bought Conqueror's Helmet for 4 coins:
https://i.imgur.com/gcwOGI0.jpg

However when I check my ingame mail there is no item in it:
https://i.imgur.com/EMsPGp3.png




I'd like to have this item in my bags because it looks cool and will be perfect match for my transmog :)

open a ticket on website:
https://www.warmane.com/account > support > create ticket > general enquiry