877-380-8539

I get calls, nearly everyday for months on end at all hours. I am on the do not call registry, and I do not owe you or any other entity any bills or back payments.
If I answer the call the (probably electronic) caller just hangs up, no response. Other times I get a recording that states it is not a sales call and instructs me to press one to speak to an operator or get assistance. If I do speak to someone they state my number is not on file and I shouldnt be getting the calls. They have insisted I would be removed and get no further calls but they dont stop, just go to a "unidentified" caller ID. They are always very elusive when questioned about who they are and will hang up on me if I ask too many questions.
The return number I get isnt functional when I call it back.
I also try 1-877-2175762 ext 4296. I get a recording that asks you to leave the information and you will be removed from their lists. Still waiting.

they will not stop calling and of course no one cares even though it is against the law

they are a debt collector for Verizon (I do not know who else they collect for)