Here's what I did to get them to stop calling...
I picked up the phone once and told the woman (after much interruption)to take me number off of their calling list.
Which they didn't.
So, after that, I picked up the phone the next time they called, and said, "I have already asked you to take my number off of your calling list. Now, this is harassament. If I recieve another call from anyone in this company, I will file a harassament suit. Thank you." And then I hung up.
Easy as that, they stopped calling.
Who would have guessed? :)