I don't see why you want a refund if it's your fault??? If it said non-refundable, then that's that. Just suck it up and move on. What you were thinking was that this 4th tier was a safety school, and now that you got into something better, doesn't justify you suing them. Being a lawyer or knowing one or being in the field of law doesn't mean you just start suing everyone just because. And just to re-emphasize, you are the one that messed up, not them.