This is a criminal extortion ring operating out of India. ABC News released an investigative report on it in June. The FTC has indicted one of its ringleaders for criminal fraud:

http://abcnews.go.com/Blotter/phantom-debt-co ... 16512428&page=1

http://www.ftc.gov/opa/2012/08/bgm.shtm

In the meantime, you are going to have to do whatever you can to protect yourself. That includes letting them know you are aware they are running a scam and are reporting them to the authorities.