So how is this a scam accusation specially against yobit , yobit is just a exchange you pay fees get your coins listed and weather you dump the coin or the owners they don't care it is mentioned in their terms yobit is not responsible for the price of coin you should have done a research about the coin and how much supply the owner had.
They do not answer tickets.
Nothing new for yobit they never reply to anyone's ticket forget it your money is gone it can never be recovered now. Just type yobit in the search and you will find so many complains against them.