Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
1
If you purchased Office directly from Microsoft, log into your Microsoft account on this link, do you find the Microsoft 365 subscription, or Office licence listed there, and if so, are you able to download and install Office from there.
https://account.microsoft.com/services/
2
If you do not find the Office licence/subscription listed on your account, go to the Billing and purchases section, do you see your payment listed there, and if so is it indicated that purchase has been successfully processed.