@ Georgesplane- The national do not call registry phone number is 1-888-382-1222. You can also register your phone number at www.donotcall.gov. It takes about a month for most of the telemarketers to stop calling, but if they keep calling after the first 31 days, you can file a formal complaint with the registry.
If people file enough complaints, the government will fine the company. This happened with the company that was robocalling people telling them "your vehicle's warranty is about to expire...". Now this company has resorted to marketing through the mail. The company sends out junk mail to households across the country, trying to sell automobile warranties.