Call starts out as a robocall ("Please hold for the next representative"). A live agent then joins the line. He identified himself as Mario and would not state his employer until I verified my identity (which I refused to do). He stated it was for a personal matter and that the company name would reveal the nature of the call. He gave up and stated that he would send a letter.
They did not leave a message but continues to call, comes up Robocaller.