Bought HoT but got no slot
If you haven’t received your slot, try support. They’ll be able to solve that for you.
Just to clarify, you have definitely applied the code to your main account, and not started a new account by mistake? And do you see 4 beta slots on your character select screen?
Otherwise, as dsslive stated, contacting support will be your best bet.
Edit: Also, I saw that it took some players up to 10 days before they got their extra slot, so there is some chance that yours might be coming very soon.
(edited by Zalladi.4652)