understandable , but these exchanges aren't yobit
since you are doing the research here in the forums you should had seen that many people have different kind of coins stuck in yobit even they did the right transaction to the right wallet
in your case you just gave one of the shadiest exchanges a reason to scam you and I'm afraid there is nothing that can help you if their support didn't help you
just forget about the coins and move on cause yobit doesn't care about one more negative feedback