Im not defending them, just want to clarify something.
From MtGox.com: You agree to this before you send a wire
Any fee charged by your bank or an intermediate bank will be deducted. Our SMBC bank charges a 1,000 Yen receiving fee.
Since they gave you the wrong info (I'd like to see that specific chat log) then they are liable to pay for the fees to your intermediate bank.
However, it sounds like they did in fact credit your account for the amount that you would have gotten if they received it the first time.
Once the credited your account for the $25.00, Im not sure that they MUST give you a refund, since Wire fees are irreversible.