Apple ID

If you want to clear your Apple Balance, you can buy a product in e.g. the App Store or iTunes Store which costs the amount you have left. If the amount does not match a purchase, then the rest will be deducted from your credit card or other payment method you have associated with your Apple ID.

If you don't have other payment methods associated with your Apple ID and don't have the option to add it. Then you can contact Apple Support, who can help you reset your balance.

You can see how to change your region here:

Change your Apple ID country or region - Apple Support

Contact Apple Support here:

Contact Apple for support and service - Apple Support

Contact Apple Support directly, they will help you clear your Apple Account balance, click -> Get Support

Fill in the field >Tell us what's happening<

If you then want to change Country or Region, you must comply with all regulations described here -> Change your Apple ID country or region -> 

Change your Apple ID country or region – Apple Support (UK)

I'm an "end-user" like you, unfortunately I can't change anything. But I would recommend you to contact Apple Support, via the link in my previous answer. They can certainly help you.