Registration mail lost

Hello .. i changed my acc mail since 2015 ... and i changed it yesterday to new mail .. but missclicked @ email and it back to the registration email ... i didnt log in @site cause the 2 auth factors ( have morethan 100 coins @ acc ) .
i have access to my new + old email .. i forgot only the registration email ( lost ) and since 2015 i have the same email .
i have all mails since 2015 of changing passwords exc .. and i have the mail of buying the 10£ ( for premium ) .
i need help please asap .. and thank you