Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello, thank you for reaching out to Microsoft Q&A.
The free trial automatically renews at the end of the 30‑day trial period.
If you see a charge immediately, it may be a temporary authorization or hold on your payment method. This is normal, and the pending charge should disappear within a day or two, and your bank will release the funds.
For refunds,
You can sign in with your Microsoft account on the Services & Subscriptions page here to check and cancel your subscription. The refund will be issued to your original payment method within 3-5 working days after the successful cancellation.
https://account.microsoft.com/services
Let me know if you still need more help.