Thanks
P.S. It's been over two weeks
Such issues are normal on every centralized exchange . reason for this issue is either the coin you want to deposit or withdraw have issue in its blockchain like BCN and ZEN , in this case you cant do anything except waiting for that coin team to resolve this issue . Yobit is also helpless in this case .
2nd reason is issue in smart contracts of Yobit or similar issue on Yobit side , these are solved by Yobit itself .
i have seen many times Yobit keep wallet on maintenance even in case where coin blockchain working fine . in such cases users also have to suffer from low price after issue resolve . Yobit customer care is also good for nothing no reply .
But still if it takes long period then you can ask them on twitter , email or you can also ask from admin in chatbox/trollbox on their site .