sister got me suspended

You can view your ban by logging in at enforcement.xbox.com and from there file a case review if the ban is eligible for one.

To see about submitting a case review, you would need to go to
http://enforcement.xbox.com However, you are responsible for your account at all times.

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

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!

I’ve been suspended for 6 yrs now it doesnt come off. If other people in your house use Microsoft rewards too many people in the same house you get suspended that is what happened to me. Can’t help I have brothers and sisters didn’t even know my dad had
a rewards account but they said I violated the terms and suspended me and 6 yrs later they still haven’t taken it off. Hopefully it was a mistake and someone will get back to you and explain why u were suspended so u can at least see if it was done in error.

Love the stories people come up with when they been banned,

It wasn't me it was my brothers, girlfriends, sisters, dogs cat got me banned