They called SEVEN times today in the space of less than ONE HOUR!!  I have a Panasonic phone that blocks 30 or 40 numbers and I had programmed this company in a couple of days ago.  My phone rings once or half a ring, stops ringing and then they hear a busy signal.  They still show up on my caller ID.  I filed a complaint with the donotcall.gov site.  That seems to brings results most of the time.  I urge everyone to do that.