Originally Posted by After Shock Media

If you follow a proper DMCA notice to everyone along the chain you will see results.

Site owner
Hosting Company
All Sponsors
Billing companies if they have them.
Registrar (where they regged at)
Higher up the Registrar ladder if they are a reseller.

And at ICANN make sure you also follow their procedure as well.

Doing all that which should take less than an hour, and you will see results in a few days.