Managing personal Outlook.com account settings, security, and privacy
Sorry you're dealing with this. If your Microsoft account was compromised and you can no longer sign in to Xbox, start with the official recovery tools:
When completing the recovery process, provide as much information as possible, such as previous passwords, your Xbox Gamertag, purchase history, and any other account details you remember. Using a device and network you've previously used to access the account may also help with verification.
Please note that this is a public community forum. We cannot access accounts, verify ownership, reset passwords, or recover accounts on your behalf. Recovery must be completed through Microsoft's official account recovery process.