I have linked 2 different PSN accounts to EA account

If you don't have the option to unlink an account on your end, you'll need to get in touch with the support team so they can help out. Afraid we're not able to make any changes here on the forums.

If you create a new case here and select Game Support > EA Account > I want to update my EA Account information, you should be able to get in touch with the support team so they can take a look.