Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
If you order a trial and forget to cancel on time, you will be charged at the end of the trial period. The important thing now is that you turn off recurring billing and then cancel. The exact steps depend on whether you purchased directly from Microsoft or from a third-party seller. See https://support.microsoft.com/en-us/accounts-billing/subscriptions/cancel-a-microsoft-365-subscription .