If you're banned on your old account, chances are if it was a permanent ban, it's still in motion.
I'd suggest you either privately contact a Administrator, as they're the only ones with access to most game files. Or, you make a new account and abide by the rules to avoid being banned in future. Seeing as you've already made a new account on the forum, I don't see the issue in doing the same for in-game purposes.
I can check the ban log on the forums, but not in-game. If you'd give me your old forum username, I can look into how long your ban lasts.