Good to hear it. It's been cases where the exchanger holds the coins and doesn't return them to their owner, or they blacklisted them for future transactions.
Even more amusing is that the coins that the exchange returned to me had a 1% risk score. In a way, they 'cleaned' my coins even though they refused to process the swap order. 
That is pretty ironic
they wouldn't process your swap but ended up returning your coins with a lower risk score, so the refusal kind of acted as an unexpected “cleaning” of your assets.