The chat is the best place to contact them and they will connect you to the team, but you need at least 0.01 to your Yobit balance to be able to use the chat, you can also contact them if you have that amount, it's very hard to contact Yobit, you can get an answer on their telegram channel but they cannot give you a definite answer.
The chats box it's for a user to communication with each other, I never see the Moderator/Support/Admin from Yobit showing at chats box.
A telegram was fully by a scammer, went you have a problem like "Money" at the platform/exchange the most recommended it's by contacting them at their site not outside from the service.
Anyway, you also not get responded using support ticket at Yobit, how could you got respond went contact them outside from the site. You can try to see at their Twitter, a lot of people have some problem with yobit and still don't get a response from their Official Social Media.
The best option, avoid them. But if you want to trade with a shitcoin, i will not remind u. before that, you should know the risk went using yobit after that you got a problem. Just says goodbye to your fund.