Also on DO NOT CALL LIST, but apparently that don't mean anything. They have called 3 times today. One time I made mistake of answering. Did not give them time to say what they want. Told them not interested and hung up.
And you might want to consider a call blocking device or phone..
The T-lock Incoming PRO Call Blocker sells for under 60 bucks on Amazon and can block up to 1500 numbers.
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=call+blockers