First Revenue Assurance telephone harrasment on minor child's cell phone Denver Colorado

They repeatedly called my child's cell phone looking for someone else. I spoke with this person and told him who he was calling and asked to have the number removed. He called me many 4 letter words and threatened me with continued calls. He called her phone 8 times in one day from the 940-269-4301 number. I called that number and told them to stop. It didn't. Then their other office at 303-595-4400 started calling the number repeatedly. I called again and told them to stop. I finally spoke to someone named Maggie at the 303 number. (I have left messages at both numbers before). Maggie told me she would have the number removed and then hung up on me. It won't end here.

Cynthia
Charleston, South Carolina
U.S.A.