Pet/Mount bug. Need some help.

So I'm a blood elf paladin and I recently earned level 20 and I bought a warhorse from my trainer. I pulled up my spellbook, saw I had received apprentice riding, but there was no mounts tab. I checked everywhere, nothing. So I decided to go to the stable master, and I couldn't do anything, no options. I went to go see the riding trainer and all I could do there was buy journeyman riding, which costs 45 gold and is for level 40's so I didn't even bother with that. At this point, I started to get a little frustrated and decided to buy a pet to see if the pets tab would pop up the mounts tab. NEITHER POPPED UP! I decided to buy a new mount and STILL nothing popped up. I sent an open ticket, but that's taking forever.