My store credit is less thane single item

Hey there, thamer16.

Welcome to the Apple Support Communities. We know that changing your Apple ID region can be vital, so it’s understandable that you’d want to clear out your iTunes Store balance in order to make the change. 

“About unused Apple ID balance

You can't redeem or return Apple Gift Cards, App Store & iTunes Gift Cards, or unused Apple ID balance for cash, except as required by law. If your jurisdiction allows for refund of redeemed gift balances, you can contact Apple Support to request a refund. When you contact Apple, please include the following information:

• Your Apple ID.
• The refund amount.
• Your current shipping address.” Check your Apple ID balance - Apple Support

We hope this helps!

All the best

Or ask Support to clear your balance.