That was unfortunate. I can't imagine any solution that a bad actor couldn't reverse or make worse.

I think you're going to have to create a duplicate account, move your profile over and employ all of your followers to drop the old account and follow the new one.

You can post from both to give some sort of proof of truth, and the sooner everyone is off the old account and following your new one, the sooner you can pretend it never happened.