Forum Discussion
I've got a lot of things to say but lets just sum it up to the following.
Whoever owns the account is responsible for all cheating that occours on that account, also when your account was breached.
And now for the standard message:
Answer HQ cannot handle bans. We don't have access to your account - we can't look into any specific cases. All we can do in here is link to your options.
The following link will show you your options, including how to dispute bans:
https://help.ea.com/article/information-about-banned-or-suspended-accounts
This will tell you in detail about Battlelog rules and bans:
https://battlelog.battlefield.com/bf4/forum/threadview/2832654348586821015/
This page tells more about Punkbuster bans:
https://help.ea.com/article/punkbuster-bans-and-violations
This page is about GCC-Stream bans:
https://help.ea.com/article/i-was-banned-from-servers-by-ggc-stream-how-do-i-get-unbanned
And last, but not least, this page is about Fairfight bans:
https://help.ea.com/article/battlefield-4-ban-codes-issued-by-fairfight