Hey @OG_VSM,
The account ban history on the website shows specific account actions, but won't show every type of ban or suspension, sorry for the confusion there.
If you're just getting back to the game after some time away to find the account's been banned, I'd definitely take a few minutes to go through these security steps and make sure the account's been secured.
One concern there would be that someone else potentially gained access to the account, so that will help make sure you're the only one in the account before our Terms of Service team reviews this.
After that point it's just a matter of submitting an appeal so they can review the ban itself. There's a bit more information about that in the link below, but as you mentioned you've already created a case you'll just need to wait for them to investigate at this point. They should reach back out via email as soon as that's finished.
https://help.ea.com/en/help/account/information-about-banned-or-suspended-accounts/