Managing personal Outlook.com account settings, security, and privacy
Hi Gaz Harrison,
I understand how serious this is, especially because the account contains purchased games and an active Xbox subscription.
Please note that this is a user-to-user forum, so contributors cannot access the account, change its security information, or restore access.
Since the recovery requests have been unsuccessful and an unfamiliar phone number appears, the most practical next step is to contact Microsoft Support through live chat:
1, Visit the Microsoft Support contact page: Contact - Microsoft Support
2, In the search bar provided on the page, type "Account recovery" and press Enter.
3, Click on the "Get Help" button that appears.
4, Scroll down the page until you see and click on the "Contact Support" option.
5, When prompted to select your product or service, choose "Other Products".
6, For the category, choose "Manage account security".
7, Look for and click on "Chat with a support agent in your web browser".
8, Confirm your personal email when prompted - this is the email Microsoft will use to communicate with you during and after the support session.
9, When connected, clearly explain your situation. Be concise but include all relevant details.
The available contact options can vary by region, time, and sign-in status. A support agent can review the available support path and address the subscription concern, but cannot bypass account-ownership verification, manually replace security information, or send a password-reset link.
You may also review Account recovery unsuccessful - Microsoft Support . The article recommends using the Sign-in Helper when the additional security information is not recognized and confirms that another recovery request may be submitted up to twice per day.
I hope the live-chat option helps you reach the appropriate account-support team.