Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi!
You can access https://account.microsoft.com/services > Sign in with the account that Microsoft 365 is linked to > If M365 appears here, it indicates that everything is ok.
If it doesn't appear, try redeeming it through this link: https://setup.office.com/
After redeeming, access https://account.microsoft.com/services again > Click on Install Desktop Versions... > Install > After downloading, install the product, open Word or Excel and sign in with your account again.
Regarding recurring billing, if the payment method option doesn't appear in Subscriptions, perhaps recurring billing is not activated or was purchased from a third-party store (you should change this in the third-party store).