That looks fishy as fuck and looks like a scam to me. Yobit also uses .net not .ch. Are you sure you're not using some phishing website? It seems weird that a site would ask you to do this sort of verification and for such a high amount of money.
Thats a scam. Notice how the Yobit support tells him to deposit, generate a Yobit code (which is worth the coins) and send to him. Thats basically depositing in the scammers account. Its like getting called from the bank, where they say deposit $300, withdrawal in a ATM and give it to me. Bank procedure, you know?
OP is in need for some basic 101 dont-fall-for-phishing-scams classes. Thats a classic one.
Here is a case exactly like this one:
https://bitcointalk.org/index.php?topic=2708561.msg50180479#msg50180479