I NEED HELP PLEASE

It's been years since my XBOX account is linked with an old email that doesn't exist anymore & that is impossible to get back. 

I tried many times to unlinked my XBOX account from this email, but it's impossible to do so without being connected with the email. 

I need someone from EA to help me. 

I just bought the new Battlefield 6 & I want to play it on my Xbox while being connected with my "new" EA account. 

Please unlinked my XBOX account from the old EA account.

Thank you for your reply