Invalid Email

I bought Battlefield 4 on steam (2 years ago). I didn't have an EA account linked to Steam. After the first launch of BF4 through steam, the EA App downloaded without my participation and the game launched. But the EA App created an account for me with a different email, and instead of a nickname in the game, I have the numbers 2411200000. Now I can't even change my nickname because the email is verified. BUT this is NOT MY email address and I don't have access to it