A family of Microsoft word processing software products for creating web, email, and print documents.
1
Close any open Office apps.
Use the steps provided on this link to remove the Office licence from your Apple Mac.
Then log back into one of the Office apps with the Microsoft account you used to purchase the Microsoft 365 subscription.
2
If that does not resolve the problem, log into your Microsoft account on this link, is your Office licence listed correctly there, or if that is a subscription, check the expiry date listed on your subscription, is that listed correctly.
https://account.microsoft.com/services/
If not, go to the Billing section, is it indicated your payment has been processed correctly.