Sorry xoRyuzu, did you not say you'd already tried that previously? I wouldn't want you to go through that unlink process again if you've done it in the past.
Your PSN essentially started linked to a different EA account, then it was moved to this one back in 2023. If you've already linked it back to the original EA account, checked that nothing was restored, and then moved it back from that original account to this one again, there wouldn't be much point to another unlink.
If you haven't yet moved it back to that original EA account to check, that would be worth trying. Definitely feel free to resume a case with the support team if you run into trouble with that linking process specifically.