other than contacting yobit and finding a way to confirm your account details with them, the only other things that i can think of are work-arounds.
can you think of any computer that you logged into yobit on and may have saved the password or is it there new security protocols that are an issue?
what is the domain of the email? it may be easier to try to contact or retrieve the access to the email versus access to yobit
I only used my phone. I lost the email when my mobile got reset so the computer is not an option.
As for the yobit I only used my phone also. I know the password to my yobit. My only problem is the authentication code sent in my email because I don't have access in my email.
since you are in their signature campaign and i think you only have their signature payment there, they should be able to do something about it, just contact them with your bitcointalk account here and ask them to do something for you.
It's not just the yobit earnings. I have coins in there which I use for trading. I am an active user in them.
I tried sedin a support already but no response yet.