Okay... this one is rich.  You are gonna love it.  Get a phone call from someone calling themselves John Brooks.  Didn't leave a company name.  Didn't leave a call back number except to say that "it is on your caller ID".  What you don't know you own company's phone number I am supposed to call back?  Left an extension number and supposed case number.  Now.. what reputable person is not going to leave a phone number, company name, reference, etc.  Did a cross on this number and there is nothing at all on it. Again, if calling from a reputable company... wouldn't their phone number be available?