Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
What do you mean by Google Microsoft Word? Do you mean it was subscribed via Google Play?
If so, the cancelation needs to be done via Google, not via Microsoft.
Microsoft explains it here: https://support.microsoft.com/en-us/account-billing/manage-your-microsoft-365-subscription-purchased-through-a-third-party-44749f45-4c0b-5d41-a73f-7634b8d2a763
However, if it was subscribed via Microsoft directly, please go to https://account.live.com
Sign in to your Microsoft account. Then go to Services. Click on Manage for the subscription plan you want to cancel.