Who Me Too'd this topic

I'm having trouble linking my PSN account to my EA account.  Looking at the screens on Star Wars Battlefront, I think I have an old EA account set up with a disused email address that I no longer have access to.

How can I link my PSN account to my new EA account?  I can't see anything on this site to let me do this, I can't even see a way to sign out of the EA account in Battlefront.