Who called from 5302165075

Calls and never leaves a message, blocked calls but still gets through.  I called number back to tell them to not call me and they answer with a taped message saying they are with a contest service and that do i want to punch numbers to win a contest.  I do not know this number nor am a contest player!  prank or spammer

Yea they keep calling me, but i don't answer.

Keep calling, if you answer then the call drops, if you don't it goes to voicemail and stays connected just long enough to leave a no message voicemail.  If you call back there is a taped message for a contest, if you continue on the line it later states if you want to be removed to press 1, once you do that it states it will take 48 hrs to remove you.  Ummm, NOT!!  Still getting the calls.

When I answer I hear nothing then call hangs up. I call the number back & all it does is ring then hangs up on it's own !

I answer and hear nothing i call back and hear nothing not even the option of leaving a message