I see your problem now, sorry 'bout that. It is possible that your only recourse at this point would be to get a lawyer and start filing complaints with your local police about the harassment. While I don't know where you live (and it seems I'm the only person who doesn't... Just kidding

!), many states have rather strict anti-stalking laws. Some are downright Draconian, in fact. There is also a rising trend to include Internet harassment under these anti-stalking statutes.
So anyway, this may be your only recourse. Sorry that you have had such a bad experience with your website. Hopefully it will improve soon.