Dear @Austin Truong
You can submit a refund request through your Microsoft account.
- Go to the Microsoft Services & Subscriptions page and sign in with the Microsoft account used to purchase the subscription.
- Locate your Xbox Game Pass subscription.
- Select Manage and check whether an option to cancel the subscription and request a refund is available.
- Follow the instructions provided to complete the refund request.
Refund policy: https://support.microsoft.com/en-us/accounts-billing/subscriptions/microsoft-subscription-refund-policy
If you don't see an option to request a refund, I recommend contacting Microsoft/Xbox Support directly. https://support.microsoft.com/contactus
Best regards,
Bence