I can't link my Steam account with the purchased BF 6 to my EA account.

I bought Battlefield 6, but I can't link Steam to my EA account.
I had another Steam account linked (Bobrowww), but I lost access to it. So I created a new Steam account (ContoraGeniev) and tried linking it, then unlinked the previous account in my profile settings. But it didn't work. I got the error "Linked to another account."
So I tried creating another EA account, really wanting to play the game, and I was able to link the new Steam account to it. But I can't use that EA account; all my achievements are here.
Please link Steam (ContoraGeniev).