I've gotten multiple calls saying I was referred by a friend for a home security system. I usually listen to the recording and press whatever number to be put on the do not call list, but they keep calling. Usually from different numbers with the same recording.
This is for a home security system but the caller is a robot named Amanda. She denies it and laughs if you ask if she's a robot. Similar to the article in Time Magazine. http://newsfeed.time.com/2013/12/10/meet-the- ... s-shes-a-robot/.