My ea account was stolen and later banned

Hi turkishbakllava

Sorry to hear that. It's best to secure your account as much as possible first of all, if you haven't already. The guides below might have some things you can try to make sure that nobody else has access to it:

https://help.ea.com/en/help/account/secure-hacked-ea-account/ 

When you've secured your account you can appeal through ban with the ToS team. I can't guarantee that they'll revoke the ban, but they're the only people who can potentially remove it. This guide should help you with the process:

https://help.ea.com/en/help/account/information-about-locked-or-banned-or-suspended-accounts/