Hi K,
I am Sumit, an Independent Advisor here to assist you.
If you want to Refund an app/game, Microsoft Store allows you to request a refund within 14 days.
For Software products, the days can be upto 30.
For games, additional conditions like should be played less than some specific hours apply.
https://support.microsoft.com/en-in/help/10558/...
https://beta.support.xbox.com/help/subscription...
To request a refund, please go to the following page:
https://beta.support.xbox.com/help/subscription...
You should see your order after signing in.