You can try to color remove the whole suit, but just remember that it might not work correctly the first time. You might have splotches and streaks left. The spats look pretty good, so you might have good luck with the suit as well.
I studied in Thailand for a few months...I learned that other countries don't seem to have the same "return policies" that U.S. people take for granted. The thinking seemed to be that if the customer spent money on it, they should have inspected it very well first to make sure they were satisfied before they purchased. If they didn't, then that's not the fault of the seller and the buyer shouldn't blame them for their own lack of caution. Caveat Emptor is just the way all business is usually done. I'm not saying I agree with or like that kind of "service", I'm just saying that it's routine and expected in some areas outside the U.S.