My old email no longer exists, need xbox unlinked from it

I have the same issue. I have talked to the chat employees numerous times. They always ask questions about the EA account (which i dont know anything about because it is an emailadres i dont have) so if i dont have the right answers they cut off the chat and they say i need to try again. But they have always the same questions. In their eyes i need to prove that i am the ownner of that emailadres bit i dont use that emailadres and dont know anything about that emailadres or EA account

I just need them to disconnect that ea account from my PSN so i can connect the right EA account. 

Please help!!!