I continuously receive calls from this number...how can it stop?

I have tried to ask to speak to a supervisor about taking my number off of their list, but they hang-up on me. I have received three calls today along. this has been going on for three or more months I am tried of the calls.

Just got a call from this number. I've become very adept at turning off my answering machine and letting the phone ring.

Just got another. Sheesh!