Hey HitCycler,
Sorry to hear that there's been difficulty linking your Xbox Game Pass to your EA account.
I'm afraid we're unable to directly support account-related issues as we can't discuss account details here on the forums. The steps on this page would typically help you update your email address, but since you no longer have access to the email itself, it'd be best to just scroll to the bottom for the Contact us option. An advisor will need to verify a few account details and should be able to work with you to get things updated from there.
Once you can receive verification codes, this page has more information on linking your Xbox and EA accounts.
Let us know how it goes, thanks!