Please help I have been hacked

Please follow the steps here as soon as possible: https://support.xbox.com/en-US/my-account/security/compromised-account-solution This is an issue to involve Offical Support as to identify if there are any fradulent charges on your account after it has
been compromised.

This page has details on getting back into your Microsoft Account as well: https://support.microsoft.com/en-us/help/10494/microsoft-account-get-back-compromised-account

If it's strictly an Enforcement Issue you will have to utilize the Case Review process, as the Enforcement Team does not have direct Offical Support channels and does not have a presence on the Forums. More details about the Case Review process can be read
here: https://enforcement.xbox.com/en-US/home/howTo#sub-topic0-6

If your account has been compromised, you would need to contact support and have them start an unauthorized access investigation.1 -800-4my-xbox if you're in the US/Canada or
http://support.xbox.com/contact-us

Then you'd want to go to http://enforcement.xbox.com to see about submitting a case review.

no i can't even play online with the game. When I got to online all of the levels are grayed out, I can't select anything

I have been given over 2 billion negative points on Call of Duty World at War and now it won't let me play online, Please help

Did you refer to the post that Vernier provided? It sounds like you've received an in-game ban.