Quote Originally Posted by TFOGGER View Post
Me: Not interested (having heard the spiel before, and not wanting to wast 20 minutes on the phone). Hangs up.

6 minutes later: Repeat. Same person on the other end of the phone, probably in India, Pakistan, or the far East. I've had to get downright nasty with them to get them to stop. For one day.
while not guaranteed, try "place this number on your do not call list immediately" rather than "not interested"

if they abide by telcom laws, they're required to stop calling if you use that verbage.