If your XBox Gamertag is truly associated with a "dead" email address, you'll have to resolve that through Microsoft.
But if it's simply a matter of your EA account needing adjustment, see here: Gamertag / PSN ID and EA Origin account / BSN account - Connection & Changes
If the issue is more complex, then the only people who could assist with account, log-on, purchase, entitlement, or refund issues are the EA Game Advisors.
You can reach them at help.ea.com/contact-us.
Provide the Game, Platform, Issue, Short Description, and select "Chat Now".
ProTips:
1. Be at your gaming rig.
2. Be logged-on to your EA/Origin account (unless that's the problem, obviously.)
3. Be able to spend up to 60 minutes "on hold" before reaching someone.
Good Luck! 🤓
