Thanks for the post , votes, and comments. We are aware of this limitation and are targeting sometime next year to improve this experience. In the meantime you can sign up for a new account in your desired country and transfer your assets to the new account via Support.
-Azure Billing Team
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Completely unacceptable that this is still not able to be changed. I'm going to need to move off Azure now because I'm not able to add a payment method for the country I work and live in.