Can not change country of apple ID
Changing the country for an Apple ID is impossible. Unfortunately it has never been. It is most probably related to the fact that you are not expected to simply hop from one country to the next and change your payment information associated with your Apple ID (i.e. local credit card) with it. 

However, it is possible to open multiple Apple Accounts each associated with a different country and if needed a credit-card issued in the respective country.