Hello Darya Gudyno,
I'm sorry to hear that you're having trouble with the billing address section. To change the country in the billing address section, please follow these steps:
- Click on the drop-down menu next to the country field.
- Scroll down the list and select your country.
- If your country is not listed, please contact Microsoft customer support for further assistance.
If you continue to experience issues, please let me know and I'll do my best to help you.
Best regards
Bblythe Xiao