Regarding your situation. Advise you signup to Prepaid Legal I use it and it has helped me a lot. I don't sell it but it is worth it. Then write a letter to your Senator, Consumer affairs, BBB and whom ever will listen to you. State the facts only!
Then send a copy of the correspondences to the registar with your reply address. Send it registered receipt by USPS. Then if no response in 30 days hit the TV circuit! 15 mins of Fame
It should raise some eyebrows!
But before this is started above review your contract with the registrar when the name was registered. Read the fine print.
Another way is to register like name with different extension and have the word trademarked through Mr.Trademark.com they are a pretty good service. Tell them worldsavers sent ya. Then open the website and do business, later come back to them for Trademark infringement. Now the Feds are on your side!
God Bless you and good luck!