What's the worst customer service experience you have ever had?

Today we were coming back from New Jersey and stopped at the toll plaza on US1 south and the lady was a total biotch to my man, he asked her a question and she rolled her eyes at him then proceeded to ignore him, so after we got our change he says to her “you must love your f*ckin job!” as we drove away she began screaming at us. Lol she was totaly rude, it really sucked.