sent my XEM to yobit and said :

Deposit/Withdrawal coin will be available after you upgrade the source code of the wallet. Unfortunately the developers are in no hurry to send you updates
- therefore, in order to avoid the loss of users, the network is not available.
If you have updated the source code of the coin, send us (https://yobit.net/en/maintenance_request/ Free)and we will promptly correct the problem on the coin.
Thank you for contacted the support.

any suggest what to do ?