Hi, I'm John!
It is region lock. I suggest requesting a refund.
If bought from Microsoft Store, refunds are handled through Microsoft/Xbox billing. The best first step is to submit a refund request using the official page below:
Request a refund for digital purchases: https://support.xbox.com/help/subscriptions-billing/buy-games-apps/refund-orders
While refunds for in-game currency aren’t always guaranteed, Microsoft does review cases like this individually, especially when accidental or unauthorized purchases are involved.
I really hope this information is helpful! Let me know if you have any further questions or concerns.
Regards,
John J.D.