How to zero my apple balance and change the region

Contact Apple Support directly, they will help you clear your balance: Get Support

Then see this Apple article:  Change your Apple ID country or region

Change your Apple ID country or region - Apple Support (KW)

It looks like you're trying to change the region of your account. Clearing your Apple ID balance would require you to contact Apple Support:

Contact - Official Apple Support

Sometimes, they may ask you to spend your remaining balance before they can fully clear it.

Hope this helps! Best of luck!