I'm trying not to sound like an ass here, but what you should do is find a different hobby/source of income.
A ban for plagiarism is permanent (it has been said a couple of times before in this very thread), and it's you (as a person) that is banned, not (only) your account... So if you buy a new account, and somebody finds out, the new account will also be banned and you'll lose any time/funds you invested in the account.