Calls but leaves no message.

They call about 5 times a week but when I answer it (and I always do) no one is on the other line!  I call back and they say, "If you'd like to be removed press 2 or whatever and within 72 hours you'll be removed"  That was weeks ago and I am still getting nearly DAILY calls!

Same activity here.  My home answering machine records a hang-up and all I have it the number.  Reverse lookup points to an unlisted land-line phone in Massachusetts.  After 4 or 5 calls, I return the call from an unlisted cell phone and usually get a recorded message.