I really don't know what to say to you OP. I hate the idea of beating on a guy who's already down so I guess there's no use pointing out the mistakes you've already made but hopefully you learn from a very expensive lesson. Bitcoin and crypto are incredible in the sense that only you are in control of your funds, so always double, triple check before you sign any transaction. It really doesn't take more than five more seconds to confirm you're doing what you want to.

Stay away from exchanges like Yobit too, keep your trading with centralised exchanges only as you need/require. Sooner or later, they all bite back.

Keep asking them every now and then, you never know your luck with them might change. Difficult to keep courteous and polite I know, but being aggressive won't help your cause. Maybe even ask them how much it would cost in a brand new support ticket to recover this for you. Maybe you have to accept their fee.

Sorry to say you should give up hope on that 10 ETH.