Hi 1fdc365856917b31,
To unlink your PlayStation from your EA account, you need to log in to the EA account portal. Without the login information and two-factor authentication, you will not be able to unlink.
However, unlinking causes permanent data loss, among other risks:
Before opting for that, consider connecting with our support team. They may be able to help you update the email registered to your original EA account, once they've verified you're the account owner they are chatting with.
Open this EA Help guide, and then scroll down to the bottom to find the 'Contact us' button. This will help you start your support case.
- EA_Lanna