Hi Hariharan R1,
Welcome to Microsoft Community.
Windows 11 products from the Microsoft Store offer a digital license associated with a Microsoft account.
Activate Windows - Microsoft Support
For digital licenses, you should be able to complete Windows activation on the corresponding version of Windows device by signing in to the associated Microsoft account.
If the activation process cannot be completed, you may try contacting the team associated with product activation for further assistance.
Alternatively, you can contact the Microsoft Store support team for details regarding product refunds.
Returning items you bought from Microsoft for exchange or refund - Microsoft Support
Troubleshoot buying issues with Microsoft Store - Microsoft Support
If I misunderstand your situation, feel free to correct me and share the information.
Thanks for your patience and understanding.
Best Regards,
Kyo.Y - MSFT | Microsoft Community Technical Support