Lost all of my content when delinked the EA Account

Hi, I hope somebody could help me in my problem. I bought my Xbox froma friend and used the FC25 for more then 2 months from his EA Account logged in. When I reaized that, I delinked his account from my device, but now I lost all of my characters and points have bought in the game. I tried to logged in back with his EA Account but none of my content exist even with his account. Does somebody have any idea or suggestiom for solution how I could get back my contents? Have somebody who has the same or similar situation? THX