How to get my refund out of my Apple ID

Normally once funds are in Apple Account balance the only way to get them out again is to spend them.

From: Check your Apple ID balance - Check your Apple Account balance - Apple Support -->

"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."

The above excerpt only mentions redeemed gift balances as being eligible for refunding, and only in limited places where laws may require that. Read the document for more details.

You will have to contact Apple Support about that, only they can do that for you.