Absolutely right, the amount was successfully deposited to yobit's account that is binded to my yobit account as USDT address and i beleive ETH and USDT wallets are interconnected (one) , let assume you have an etherscan ERC-20 wallet and you want to use it personally for only USDT deposits and on the other side you are allowing your friend to deposit ETH also into the same wallet, so this means your friend doen't hold control over the wallet but only you have control. 

Thus it is pretty much possible for yobit to recover my  ETH but they never reply to a client's issue.

This is a worst exchange i have never experienced before, this exchange have no right to stay in market