Very disturbing!  It seemed to be a call originating from a hub center but in the end sounded more artificial, like a sound simulations on the back ground.  The caller asked in an impolite way if I knew to speak in English.  I asked who was calling.  She said, she is an ee calling about Electrical Bills.  I asked that they, who ever they are, remove our phone number from their calling roll.  She hanged up.  I called back the number hoping to talk to a supervisor.  Instead I received a prerecorded message that this phone is NOT IN SERVICE.  How could that be.  Any suggestions!