They are dirt bag telemarketers who will not remove your number from their service. They call multiple times a day and will tell you off if you question them calling you.
They call about credit card intrest rates and I don't even have a credit card. When I asked why they were calling some drunk redneck I couldn't even understand hangs up on me. They will not stop calling. I have AT&T and I did not receive these calls when I had verizon.