my account got banned at it wasn't my fault.

Per the terms of service you agreed to, you are responsible for your account at all times. So it doesn't matter if it was your brother or you, all that matters is that it was your account. You can try submitting a case review at http;//enforcement.xbox.com

Hi there,

The only ones who can respond to any specific enforcement actions (including account suspensions) is the Enforcement team. They do not use the forums.

You'll have to go to https://enforcement.xbox.com/ and submit a case review (if qualified).

hey,

the enforcement team doesn't use the forums. the only site for enforcement problems is enforcement.xbox.com

Suspensions are issued on the basis of the account's actions, not the particular person who was playing on your account. You are responsible for keeping your account secured from unauthorized access.

Log on to http://enforcement.xbox.com, check your Enforcement history, and submit a case review (if eligible).

My roommate was playing when I got suspended. Can it be lifted?
Xbox Live is a social platform, and we love hearing about players sharing their experience with friends and family. Xbox Live is at its best when everyone joins in the fun!

However, as the owner of the account you are ultimately responsible for how the account is used, both good and bad. When we issue a suspension, it’s not necessarily because you committed a violation, but because the account was used to commit a violation.
Even if you weren’t home or holding the controller when the activity occurred, if a particular Gamertag was used to harass other players or cheated in a game we have to hold it accountable.

If you wish to restrict usage of your account you can set up a passkey on

Xbox 360 or
Xbox One. And thanks to the benefits of
Home Gold, it’s easier than ever for every member of the household to create their own Xbox Live account!

https://enforcement.xbox.com/en-US/home/howto#sub-topic0-5

Sorry, but no one here on the forums can address issues dealing with enforcement actions.

You will need to visit Xbox's enforcement page to find out any information about your current case.

Here are some links that might be useful for future reference.

Link 1:
https://enforcement.xbox.com

Link 2: https://enforcement.xbox.com/en-US/home/howto#sub-topic0-5

Link 3: http://support.xbox.com/en-US/xbox-one/xbox-live/enforcement-on-xbox-live

Link 4:
https://enforcement.xbox.com/Enforcement/ShowEnforcements


Link 5:
http://enforcement.xbox.com/home/staysafe#topic0

Link 6:
http://enforcement.xbox.com/home/howto#sub-topic0-6