Who called from 4802125375

I keep getting hangups from this number My number is 775-629-9513

They call every few days and never talk. Hang up calls or no message

This number 480-212-5375 called and told me they were from dish network. i asked them to put me on the do not call list and he refused. then i requested to speak with his supervisor and he told me "NO". i told him i would report his company to the Beter Business Bureau if he didnt put the supervisor on the phone and he said "go ahead" and hung up the phone. I have tried to call the number back and it just gives me a busy signal all the time.