Change my Apple ID country

The article "Change your Apple ID country or region" describes how to change your country setting on everything using your Apple ID, and the requirements and results of doing this --> Change your Apple ID country or region - Apple Support

hy, i am on this problem right now

apple says that “the itunes store unable to process purchases at this time”

I didn’t do any subscription and my apple ballance is 0

can u help me?