Xbox support team

You would need to try submitting a case review at http://enforcement.xbox.com

You would have just been given a forced name change if it was just your gamertag,there will be a lot more to your ban.

You need to report the person via the Xbox and block them. The enforcement team does not work through the forums.

It is also a violation of forum rules to "name and shame" another gamertag.

Greetings,

the troubleshooting steps provided by the customer support are in respect of the rules and the regulations of the service. When playing offline you still can:

Watch TV, although you need to be online to get OneGuide listings.

Sign in to your profile, but only if you've signed in online before. This includes the Kinect automatic sign-in mode, if you set that up while you were online.

Change console settings, but not profile or family settings. Content controls will remain in place while offline.

Play games, if you have a disc or you're on your home Xbox.

Save game clips (as long as there's space).

Earn achievements.

Note There's limited space to store achievements offline, so you should go online every once in a while to sync them.

Use most voice commands if you have a Kinect.

There are some activities that you need to be online to use, such as:

Playing games and apps that require an Internet connection.

Playing games that require online sign-in, even for a single player.

Syncing and playing saved games on more than one console.

Using social features like friends, messages, and parties.

Browsing and buying content from the Xbox Store, Music & TV, and Groove.

Using Xbox SmartGlass.

Updating the console or apps

For further info I suggest you to check this support page:

support.xbox.com/.../using-xbox-one-offline

I highly doubt your last name is "Goochman." There's no way to appeal the suspension since all are final.