Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
If the subscription was purchased directly from Microsoft and the account can still be accessed, cancellation is done from https://account.microsoft.com/services/microsoft365 or https://account.microsoft.com/services by signing in with the Microsoft account used to buy it, then selecting Cancel subscription or Manage > Cancel.
If the account can’t be accessed because the username, password, or phone number is no longer available, the supported path is to contact Microsoft Accounts & Billing Support and ask them to help verify ownership and assist with cancellation. Use https://support.microsoft.com/contactus/, then enter Chat with an agent, choose Contact support, select the product and billing options, and follow the prompts to connect to a live agent or request a callback.
If the charge isn’t recognized, it can also be investigated from the Manage your payments page of the Microsoft account dashboard.
If the subscription was purchased through Google Play, Apple App Store, or a third-party retailer such as Amazon, cancellation and refund requests must be handled through that seller instead of Microsoft.
References:
- Cancel a Microsoft 365 subscription | Microsoft Support
- How to get a refund on a Microsoft subscription | Microsoft Support
- Cancel your Microsoft subscription | Microsoft Support
- Cancel subscription but no access - Microsoft Q&A
- I’m being charged for a Microsoft subscription on an account I can’t access, and I need help canceling it - Microsoft Q&A