Called cell phone, number from Minnesota. Don't know anyone in Minnesota; don't want to...

This number just called my home phone. Caller ID said ASSIST. They did not leave a message.

Called my home number. I answered; no response.  Caller hung up after about 5 seconds.  I called the number back, and got a recorded message, "Hello, and thank you for calling.  If you would like to be placed on a do-not-call list for the number that called you, please press 1 now."  Repeated the message 4 times, then hung up.  I have NO idea who this was.

Caller ID showed Minneapolis, MN I didn't answer it.  They left a recorded message.

"you may be eligible for a free home security system.  Press 1 to continue call or press 2 to be removed from the list."

I don't press anything if you do they will know it's a good number & sell it to other telemarketers.

They have called my number at least 10 times in last month.  Pressing 2 does NOT work.  I see now I should have never pressed any numbers.