I didn't call back!

I am receiving calls from this number but nobody speaks when I answer the phone. When I called this number back it says number not in service.

I got call from this number and missed the call. when i called back it alwasys busy. so i believe it is not a good idea to call back.

i got a call from these c*** suckers at 5pm and again at 5:30pm. They call everyday. i don't know what they want or what they are selling.

wow this number called and was like pretending to be some telemarketing thing and i was like oh my parents arent home and hes like oh ur under 18 im like why does it matter hes like do u have a boyfriend? im like why the hell does it matter and hes like because im looking for a girlfriend im like F*** YOU and hes like oh you want to f*** me? im like i said f*** you not i wanna f*** you . and hes like oh u probably have a nice pussy im like wow ur probably some ugly brown guy who cant find a girl..shame..and i hung up and he called right back and hes like oh yeah i wanna f*** ur hard pussy and im like wow if u call back i will call the police and hes like u cant cause im really far away from you im like oh shut the f*** up and dont call back u f***ing idiot..
ugh cant stand idiotsss

I just got the same bloody call...it's about 3 times a week now where the I answer and the MOFO says sweet F all.  There must be a way to trace these a** holes with all the technology that is out there!!!!!