YOBIT LIKE SCAM. I WAS SENT MY XEM COIN FROM BITTREX 4 DAY AGO BUT NOT YET RECEIVED.
SUPPORT TEAM ANSWERED:
Wallet is on maintenance.
The solution to this cryptocurrency will take some time, need to update the wallet.
We apologize for any inconvenience
**Please check wallet status before deposit or withdrawal
DO NOT REPLY ANYTHING.

That happens quite often actually. Poloniex does it more than bittrex. It will get resolved eventually.