My parents got divorced and they went back to court and fought over many legal issues finally it has ended and one of the agreements was that my mother pays half of all tuition and books. Plus my father is currently paying child support for my younger brother.

She told me that she refuses to pay, I mailed her a detailed list with a copy of all receipts.

I'm already going to start my third year.

I can't afford going to court and paying 250 per/hour. What options do I have?