Keeps calling me about someone who I don't know. I called to tell them that they are not at this number and I have no idea who they are. I was told my number would be removed but they keep calling. I just block it.

These people call MULTIPLE times of day and night, including 8:00 AM on a Sunday morning and there's just a recording about "If we've called the wrong number . . ."  When I block one number, they call from a different number the next time!