Here's a copy/paste worth passing on from another comment I saw and tried out; In my desperate search to stop these calls, I'm so thankful I read elsewhere of this do not call service that serves a small number of companies that call consumers; email or call 866-246-7196 scam. Give them the caller's phone number to see if it's on their list and your number to add it to the do not call list.
 Apr 08th, 2013
called again about 730 pm on a friday and left no message
 Apr 06th, 2013
No message left on answering machine
 Mar 29th, 2013