Linked account issue

Hey thank you for you time, so basically i already unlinked the banned PSN account from my EA account, thats not the issue, and that was useless because even if i tried logging from a different platform such as Xbox or Steam i would only see a brand new level 1 account. The problem is that i need to access that banned PSN account for cross-progression to work (which is impossible). My only solution and my question was if its possible to do it like manually. I can give you all the info and credentials such as the old banned PSN that my EA acc was linked to.