Who called from 3307521795

When I called this number back it stated I have been called for a marketing research or sales call.  No option to be removed from calling list.

When I called this number back it stated I have been called for a marketing research or sales call.  No option to be removed from calling list. But,I have an unlisted number on the National "DO NOT CALL LIST". I DO NOT owe anyone $, so these harassing phone calls are NOT bill collectors! I refuse to answer ANY call from a # I don't recognize. They call REPEATEDLY & never leave a message. If  it's so darn important,LEAVE A MESSAGE!!

It is ILLEGAL for these people to call my number!!!

I am on the no call list.  How is it still possible for them to call me almost every day.  I have never answered the call.