My experience from using this exchange is pretty bad, I have tried to withdraw $500 each day during 3 days annd got banned after 3rd day without any notification or precaution, just banned and that's it. Contacted support but they said our security blocked your account and you can't restore it anymore. You know what is a funny thing? I have done strict KYC there with a lot of hassle, so they have my data and they banned for nothing.
Well my experience is also not good with this exchange, I don't know why they are losing their faith. I have deposited two kind of coins, ZZC and SIBCOIN, none of them posted to my C-CEX wallet with enough confirmations on explorer. The problem is, they are not responding on any medium, support queue is always full, not replying to Tweets, all of their channels are dead!