Monthly Payments Are Not A Reccomendation

So I used to work as a customer service agent for a major cell phone company, which was a gold mine of stupidity. This call though was one of the standouts:

Me: *After going through my opening lines* How can I help you?

Customer: Yeah, I've had your service since January and I'm just trying to figure out why my service is shut off.

Me: Okay let's take a lo-sir...it says here you haven't paid your bill since January?

Customer: Right...

Me: Sir, it's July...

Customer: *Pause* Oh...you mean I have to pay my bill every month?

O_o Yeah...that really happened...