Problem while registering my product (I am able to play)

Hello! A week ago I purchased this game and registered using my activation key,
Today I tried to enter SE website using my account. I found out that the game was purchased with my email1 and my account was registered with email2.

When I tried registering the game product It asked me for a 18 digit key, wich I could not find anywhere, the registration key I got was a 20 digit, and I used it while registering on the laucher.

I tried using FindMyOrder but it said that the order could not be found
"Order Number: 11275772"

I also tried to login with my email2 into SE, but it says that my password is wrong, and when trying to renew it, it also says that my Birthday im putting is wrong also.
Just want to have everything in order, so I can play without worrying about anything (loosing account, etc)

I have access to both emails, and have all the information regarding the purchase, dates, names, etc.

Hope someone can help me registering my product, and having everthing in order.

Thank you!;)