Did you try to wait some time before use the code? Instead of use it just after the new number appear, wait until it's almost disappeared. I was like months without using yobit and when I logged in few weeks ago it worked properly. Try to wait a bit. Or if you have to QR backup, try to set it on another mobile and see if you have the same code at the same time.
I should have not activated the Google Authenticator I am not very familiar using it also tried to sync it but already sync, I have tried it and still not worked, I have the secret key, so how I am going to recover it using the secret key
You should try this 
and if not works then maybe something is wrong from Yobit when you set up. After first setup of authenticator you can't login on Yobit?
and if not works then maybe something is wrong from Yobit when you set up. After first setup of authenticator you can't login on Yobit?
Already tried it but it's already sync