calls all the time leaves no message

I have received about 20 calls from this number in 2 days!!

Has called 3 times today. Does Not leave a message. Hangs up within a few seconds of the start of my phone ringing.

This number has called me at least 20!

I got almost 20 calls from this number in one day !! How aggravating, and when I tried to answer, it would hang up.  When I tried to call back I got a recording saying "The Verizon Wireless number has been either changed, disconnected or no longer in service"....I'm calling my wireless carrier in the morning....