Accidentally linked my EA Account to the wrong Steam account

Hello,

I need help with an accidental Steam account link.

I own an EA account and my own Steam account where I purchased The Sims 4 and several DLCs.

After updating The Sims 4, I was signed out of the EA App. When I launched the game again, my boyfriend’s Steam account was still logged into my computer without me realizing it. The EA App asked me to link a Steam account, but it did not clearly show that it was my boyfriend’s Steam account. Because of this, I accidentally linked my EA account to the wrong Steam account.

As a result:

* My EA account is now linked to my boyfriend’s Steam account.

* I can no longer use my own Steam account with my EA account.

* My purchased DLCs are missing because they are on my own Steam account.

* My Sims 4 saves do not appear when I launch the game.

I understand this was my mistake, but it happened unintentionally because I did not realize the wrong Steam account was logged in.

Could you please help me restore the correct link between my EA account and my own Steam account, or advise me on the best solution?

I can verify ownership of both my EA account and my Steam account if needed.

I have not transferred or shared ownership of any games. This was simply an accidental account linking on the same computer.

Thank you very much for your time and assistance.