Why my country region doesn’t changes

See the rules for Changing your Apple ID country or region, https://support.apple.com/en-us/HT201389. Be sure and use the support options below if you have a problem. See this heading especially What to do before you change your country or region.

·      Spend any store credit remaining on your Apple ID. Learn what to do if your remaining store credit is less than the cost of a single item.

·      Cancel any subscriptions, including Apple Music, and wait until the end of the subscription period. 

·      Wait for any memberships, pre-orders, movie rentals, or Season Passes to complete, and wait for any pending store credit refunds to process.

·      Make sure that you have a payment method for your new country or region.

·      Redownload your apps, music, movies, TV shows, and books on any devices that you might use to play or read them in the future. That's because some types of content might not be available in your new country or region. (Learn what types of content and services are available in your new country or region.)

Use this link in the document if you need to View your Apple ID balance https://support.apple.com/en-us/HT202359

If you can't complete any of the steps, can't change your country or region, or you have less store credit than the cost of a single item, contact Apple Support.  If this link is not working properly, use one of the support options given below.

Apple Support Twitter  https://twitter.com/AppleSupport  There may be an hour or so wait.

Or use Apple ID account security for country-specific and region-specific help https://support.apple.com/en-us/HT204169

What happens when you try? Error message(s)? More information would help.