A transaction involving currency exchange.....not likely!
I experienced it once when RBC screwed up my instructions. It involved a 6-digit sum and cost them over 3k in currency exchange. The gal at the bank had a long face but, hey, it was her screw-up.
Bank mistakes aside, you will not be shown any mercy. Banks, like any other businesses, are "for profit" and not obligated to pay for customer mistakes.
It boils down to "goodwill" but don't expect such from FeeBay's payment processor.
Cheers
Bernie