Other than there, there is nothing you can do to recover your coins as Ethereum transactions are irreversible and only Yobit can help you.
This user did the same as you and sent ETH to Yobit's ETC address.
Nice I didn't knew that yobit is generous this way to help their users since there are a lot of complains that are popping with their deposits and withdrawals. And because of that, I don't want to refer them to the people that are looking for exchanges. For @OP, since tryninja gave you a solution and that's a guaranteed one just keep on contacting them so that everything will be resolved.