It updated on battle.net, but not in game.
I searched the forum and some people said changing the password will fix it.
I changed my password, and I have to use my old password to log in to the game, and it still hasn't updated. I log onto battle.net with the new password.
From what I've seen on the forums, I need a blue to "reset" my account.
Edit: Thought I should mention, I have a physical copy, not the digital edition. A friend of mine put her code in a few hours before me and had no problem, was playing straight away. She's now stopped playing and waiting for me so I can catch up to her level, which is a HUGE inconvenience as we have nothing better to do. Please fix it.