C-CEX is an exchange where the operators are on holiday until end of August. So it is not up to date, registration of new accounts are not possible, deposits and withdrawals are not working as expected. The best thing is to avoid them.

Regarding BTCZ:
The coin which is marked as BTCZ on C-CEX is actually the coin of the original chain which was forked after block 160 000 was reached on June 17, 2018. Currently we are on a new chain with Zhash algorithm, which is not compatible with the old one. So do not try to send or withdraw your BTCZ to/from C-CEX, because you will loose your money.

The old chain is still alive, mining is going on based on Equihash algorithm, and the name of that coin is BZEdge. Because C-CEX was lazy to update the old BTCZ to the new one, actually they are trading BZEdge.


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BitcoinZ: Forked on June 17, 2018 after block 160 000. New chain, new Zhash algorithm.
Thank you for BTCZ tips: t1QLuHkEigtkEtsLxENCosJ1YaKHzB2keH7