This male individual calls my company and asks for information regarding our company, but doesn't identify themselves and eventually becomes angery and demands the information almost yelling.  When asked if he had a contact person he was dealing with, he stated that his uncle had a contact at our company, but he didn't know it.  He later called back and stated he talked to my boss and made three complaints about me.  When I inquired with my boss, he had not spoken to anyone.