However, I haven't been able to play my old characters because my account is still considered 'starter'.
What can I do to fix this?
Odd..... you can try the "changing the password" trick which can force the account to update all its data and may resolve the issue. Make sure the game is closed when you try it.
Other than that, you would be stuck with putting in another ticket :( There are no support agents around until tomorrow afternoon and even if there were, the most they can do is force another data update which is what you will do by changing your password.
Threats of violence. We take these seriously and will alert the proper authorities.
Posts containing personal information about other players. This includes physical addresses, e-mail addresses, phone numbers, and inappropriate photos and/or videos.
Harassing or discriminatory language. This will not be tolerated.