I just finished the special promotional challenge that expires on Nov 8th, to complete the Dark Citadel and place the head on the altar. I got the reward for the Longfur mount in my inventory but when I clicked on it the mount didn’t appear in my stable. I logged out and back in again just to see if that would help and it didn’t. The head is still visible on the altar.
I just did the same. I was awarded a mount trophy called the severed head of Zagraal but didn’t get the actual mount. Not sure what has gone wrong. What gets me is some people are claiming to have completed the quest to hand in Zagraal’s head a couple weeks ago. It’s literally only popped up for me in the last five minutes. So I don’t know what’s happening…