Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello
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.
For refund, you need to chat with billing support. Do this as soon as you can while you might be still qualified for it.
This is a public forum, so for your privacy and security, we can’t help with billing issues here. Also, no one in this forum has access to your account or payment information.
Go to https://support.microsoft.com/contactus, Type "Billing" and press Enter. On the next screen, click "Contact support" at the bottom of the page, then choose "Microsoft 365" > "Manage my subscription". You’ll then see the option to chat with a Microsoft support agent who has access to your account to help review the issue.
You can reference this detail step by step instruction with screenshots I posted in this thread: https://learn.microsoft.com/en-us/answers/c/2714817