Received a call from a man who called himself "Joseph Peterson" who said he was attempting to reach a certain person.  We told them that the person he was asking about, if they worked for this company, did not work at the office they called.   Told him that, if that person worked for our company he worked in the field at one of our customer locations.

He asked us to call the person and ask the person to call that number and ask for Mr. Peterson.  We told him company policy does not allow us to contact the employees except in emergencies.

He asked for the person's contact information.  We told him that Company policy prohibits release of that information.

He got angry, called our company representative a liar.  Hung up on him.  He called back repeatedly.  Literally dozens of times.  

When we did take the call several days later, he got very vulgar and insulting and continued to call every minute of so for hours..

We did not take the calls after the vulgar calls.  The calls have stopped for now.