Huh?

A recent conversation with Time Warner regarding my phone/cable/internet bill :

Me: "Why do I have a charge for interstate calls?" (I'm suppose to have nation-wide long-distance at a flat rate)

TW: "That line is for charges made from your car... like when you're driving on the interstate"

Me: "Ummm" (trying not to tell the sweet, young lady that she's an idiot) "Why would I have charges like that on my home telephone bill?"

TW: "Oh, can you hold a moment, please?"