Miscellaneous topics that do not fit into specific categories.
If you have downloaded Office on the new device from your Microsoft account on this link (https://account.microsoft.com/services/) and you are unable to uninstall Office on the old device and you are still seeing that error, then you will need to contact Microsoft support directly, try using this method to contact their support.
Go to this link: https://support.microsoft.com/contactus
Select Microsoft 365
Click 'Get Home Support'.
In the box provided, type billing.
Press Enter, then on the next page, scroll down and click 'Sign in to Contact Support'.
Navigate to Microsoft 365 and Office - Manage my Subscription.
Select the 'Chat with support agent in web browser' option