They call all of the time.  I finally called it back and it has an option to push 2 to be on do not call list.  Today is the second time I have done this!  Have to turn the number in and you should too.
When you call back you can't hear what/who they are.

This number calls and calls and there is never anybody there.

WHO is this IDIOT?  STOP these calls, NOW!!!!!!