After having an extreme number of telemarketing calls from the same 3 vendors with about 27 different phone numbers, and making complaints to any place I could find, I finally called the FCC and lodged a complaint. Their recommendation - don't answer the calls at all - even to get info to make a complaint. I still get spurts of calls but not nearly to the level they had been for quite a while. I was listed on every 'do not call' list known to man to no avail.