Did you sign a contract? If you did, refer to the contract to see detailed
terms. For instance, if in the contract, it's listed that the 2500 is non-
refundable, then you're extremely lucky she's even willing to give you a
refund. You're highly likely to lose even if you take her to court --
because you're legally binded by law to obligate whatever terms you signed.
Give your situation, i doubt you have the time nor the time to fight her in
court.