Is it possible to remove my apple store balance?

Make a request to zero out any remaining balance on your account by contacting Customer Support by phone or chat:

• Chat now or call 1-800-APLCARE.
• International Support.

—Next—

Cancel your subscriptions and wait until the end of the subscription period. 

—Then—

Click ▶︎ Change Region. 🌐

You have to spend it, or contact Apple Support to remove it.