Here are some options:
1. Put up with it.
2. Discontinue your phone service
3. Invest in a call blocking device.
Number 3 will finally give you some peace and quiet. Good luck.
They keep appearing on my Caller ID. I called the number back to find out who they were. Recording said they are "Mountain West" and if I had a missed call from them, they were trying to get a hold of me to participate in a survey.