Stop calling me. I don't need a home security system

Received a call from a woman with a foreign accent.  She went through her spiel about my alarm system and receiving a free upgrade.  I told her that I am at work, and that I do not receive telemarketing calls.  I told her to mail me the information for my review, and that I would contact her.  I heard her saying "Shut up!  Shut up!" into the phone, but I am not sure if she was speaking to me or to her "supervisor" who was supposedly sitting next to her.  She then hung up on me.

Janice" called, and the caller ID is showing "Cell Phone MI" Said she was from ADT alarm company..   I told her I was on the no call list and please take right phone number or if their list  for they get into trouble.   Then I hung up on her

Appears to be a hijacked number.

Calling 2 x a day. Robo call. HIjacked number. "Not a working number."