Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
If you have a new Office 2024 licence that has not been registered on your account yet, log into this link and enter your product key there to link your licence to your Microsoft account.
https://setup.office.com/Home?wa=wsignin1.0
Once the licence is registered on your account, you can then download and install Office 2024 from your Microsoft account on this link.
https://account.microsoft.com/services/
Before installing Office 2024, you must uninstall the Microsoft 365 suite, then restart your PC.
Also, if you do not intend to continue using the Microsoft 365 subscription, log into your Microsoft account on this link (https://account.microsoft.com/services/) and cancel the subscription and also disable the recurring billing on the subscription.
One last thing to note: when you stop using the Microsoft 365 subscription, you will loose the 1TB of OneDrive storage on OneDrive that comes with the subscription and revert to the free 5GB of OneDrive storage, so you need to download any data you have on OneDrive (https://onedrive.live.com/) to your PC to ensure you have a local copy of all your files to avoid data loss.