Forum:Massive Vandalism - can I get some help?

Hello, my name is Zmario, I run the Nickelodeon Doug wikia (http://doug.wikia.com/wiki) and we've been having so much vandalism recently, by one particular member in general. I block him/her and disable account creation, editing talk page, and emailing - but he/she manages to make a new account. Recently, he/she vandalized EVERY PAGE on the wikia. This is about their 4th-5th account (http://doug.wikia.com/wiki/Special:Contributions/Cat_SageZero) That's their recent account's contributions. I really need help here, as this wiki is really vandalized alot - only by the same peson.  Z mario  09:31, August 13, 2011 (UTC)
 * See w:c:vstf. TK  999  09:38, August 13, 2011 (UTC)