Yobit is a scam they keep their Wallets on maintenance indefinitely and will not allow you to withdraw their old coins. I have been trying to withdraw my OMG coins without any luck for over 6 weeks now they don't respond to any of their support tickets or telegram Channel
i think if you want to open a scam accusation about that exchange or what ever you need to move this post it in the right section just move this thread here
https://bitcointalk.org/index.php?board=83.0 and provide more proof why do you think yobit is scam .