The linked EA account has been disabled and deleted due to inactivity , to restore the account you can try following the directions at this link
If you’re restoring a deleted account and haven’t created a new EA Account with the same email address as your deleted account, you may be able to restore your deleted account through a password reset. If you’ve created a new EA Account with the same email, you’ll need to change the email address on the new account first in order to reset the password for the deleted one.
Otherwise calling swtor support when the lines are open, they can help you get this sorted as EA support wont be able to see this deleted account