Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
If the payment has already gone through, first try refreshing the Office sign-in:
Open Word, click your account picture in the top-right corner and sign out of Office.
Then restart the PC, open Word again and sign back in with the Microsoft account that has the Microsoft 365 subscription.
If the message still appears, check your subscription here:
https://account.microsoft.com/services/
Make sure the Microsoft 365 subscription shows the correct status and expiration date.