Same [***] here. Nobody would let me talk to a supervisor. I called 200 times in a row and kept getting fake names and excuses why the supervisor wasn't available.
These people are evil. They call from different phone numbers. They always hang up when you question them or tell them to remove you from their list. Just call them back 10 times in a row and do the same to them. They'll take you off after that. Worked for me and they got a taste of their medicine.