You can unlink your account after 2026-03-21

Hello. I can't play FC26 online on PS5. I can't use the online features because I can't connect it to my EA account. I can't remove the account linked to my Sony and EA account, and it says "You can unlink your account after 2026-03-21" at the earliest. I want to completely delete my Sony FC26 account and open a new one. Can you help me?