Hi, I'm John! I will help you with this.
Microsoft Q&A is public, and we can only provide information.
Unfortunately, once a product key has been exposed or redeemed on an unauthorized website, it usually can’t be reactivated manually for security reasons. Microsoft treats this the same way as a compromised key to prevent further misuse.
You need to contact Microsoft Support via live chat for further assistance:
- Here is the link: https://support.microsoft.com/home/contact
- Type this keyword and press Enter: Contact Support.
- At the bottom, click "Sign in to contact support" and sign in with your Personal Microsoft account (Not work or school account), or click "Contact Support" if you're already signed in.
- In Product and services, select "Microsoft 365 and Office".
- In Category, select "Manage my subscription".
- Click "Chat with a support agent in your web browser".
If you ever find yourself stuck in a loop, please use the keywords "Contact Support" or "Live Chat" (without the quotes) and click "Contact Support" at the bottom.
I really hope this information is helpful! Let me know if you have any further questions or concerns.
Regards,
John J.D.