Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Thanks. It seems like Microsoft has blocked it at the backend.
Please contact Microsoft Support for further assistance, who will help you to remove this error.
Please go to the https://support.microsoft.com/contactus page
Type "Billing" and press Enter.
Please click on the "Contact support" button at the bottom.
Select the Product and Category for support based on your requirements.