Confused.

They stated there would be a fee.

When they charged you the fee you don't want to pay it.

Yes the fee is high, but they never said it was high or low, and you never asked.

The credit card company may back you up on this to be nice, but I don't see how they can state what an airline in another country has to post for their refund policy.

I honestly would not expect you to get the chargeback, I don't think you have any claim to it, but the credit card companies have been very good at siding with the customer and not even allowing the merchants a chance to approve or deny chargebacks lately.