Hey there,
I am sorry to hear that you got banned for cheating in Apex Legends.
If you have any questions about sanctions/blocks, please contact our customer service directly. They can take a closer look at your account and also check for any third-party access. You can reach our customer service here: https://help.ea.com/en/contact-us/
You can also contact our Terms of Service team directly. This department is responsible for the review and will investigate your case upon request. You can find all the information here: https://help.ea.com/en/help/account/information-about-banned-or-suspended-accounts/.
-rephii