It may be that their XEM node isn't fully syncted yet, which might somewhat explain the situation, but it still doesn't seem to be recognized, which partly dims that theory again. I would give it at least another 24 hours to be sure. And please keep this thread updated in case your issue solves itself, or gets settled by support, otherwise people will keep bombing this thread.
The only weird thing about this exchange is that their domain
registry details don't match their details on their site. It could be a domain lease in the end, but it doesn't look very professional if an exchange needs to lease a domain, and more importantly, it doesn't look very trustworthy if the exchange details don't match their whois details. It also seems that they aren't registered, and not licensed. It doesn't mean it's a scam or whatever shady entity by default, because the majority of the exchanges aren't registered and licensed, but you know what they say, better safe than sorry.