Regarding the refund address, what was the source coin?
Sorry, I forgot to mention it was for Bitcoin... While we're on the topic of refund addresses, I want to make a small suggestion about the content in the pop-up that appears when we hover over the blue information icon: It'd be better if you could add another message that reminds users only to use addresses that they fully control, as opposed to addresses from other exchanges
[it might save a few people from making that kind of mistake].
What was the address type? At the moment we only support P2WPKH addresses, we're going to support more soon

Thank you for the suggestion, we'll do that!