I would suggest them to fix these issues, because the negative feedbacks are not the only consequences, which YoBit may need to deal with. Trust me when saying that victims and scam busters are not the only ones who are reading this board.
I will not give up. I am willing to seek the laws and justice so that yobit is obliged to return my coins. An exchange can not do what it wants. Do not commit crimes and think you will be free.