I bought a character just to make a death knight in lordaeron. Need Help

I bought a level 80 death knight just to realize to my horror that it you can only have one death knight on the server (removing my ability to make own) so i tried to sell it back to see if maybe i can get a different class, when that didn't work i even tried deleting the character but then that just got stuck on the deleting character message for ages. I don't know what to do know, did I just lose all my money AND also lose my ability to make a death knight character in the future?

If you want to restore deleted character, use Services > Character Restoration. It's free for first 24 hours after the character is deleted.

If you want to delete the character and make a new DK, you might have to wait for a server restart til it's fully deleted (I am not sure if it affects creating new DK).

If you want to sell the DK, you should be able to do that if your account is premium. Are you getting an error message when you try to sell it?