Welcome Alexander Pirumyan,
I understand how frustrating this is, especially when both your Microsoft account and the gift card appear to be set to the United States.
Before suggesting further troubleshooting, I would like to confirm a few details:
- Is this a Minecraft gift card/code or a Microsoft/Xbox gift card?
- Are you currently located in the United States and redeeming the code from within the U.S.?
- Have you ever changed your Microsoft account country/region in the past?
In the meantime, please try these checks:
- Verify your Microsoft account country/region
- Go to Microsoft account settings: https://account.microsoft.com/profile
- Confirm that Country/Region is set to United States.
- Check your device region
- Open Settings > Time & language > Language & region
- Make sure Country or region is set to United States
- Restart the device after making any changes.
- Redeem the code directly through the Microsoft redemption page
- Sign in with the account that will own the content.
- Use: https://redeem.microsoft.com
If the answer is helpful, please click "Yes". If you have extra questions about this answer, please click "Comment".
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