Except I just got a collections letter. And I called again and they are again claiming I didn't pay and need to pay.
I don't even know what I can do at this point. I sent them a copy of all my payments (I paid for a whole bunch of things together up front, and they didn't give me an itemized receipt, only one showing my full payment). They are still insisting I owe them a couple hundred dollars I don't have.