If you got a problem at Yobit, in that case just you just donate your portfolio to them. Yobit already has a bad reputation you can check it at their social media or some problem thread against Yobit. The support yobit team will never reply to a user ticket, that's why if we have something problem maybe same like your case or a stuck withdrawal coin, that's called shit happen by using yobit exchange.

Check the coinmarketcap, and try to use top 10 exchange by them.