iTunes account balance to cash
Take a look at this page on Apple's site.

Relevant portion is repeated here:


  You can't redeem or return iTunes or Apple Music Gift Cards or unused
  store credit balances for cash, except as required by law. If your
  jurisdiction allows for refund of redeemed gift balances, you can
  request a refund by contacting iTunes Store Support, selecting a
  support category and topic, and including the following information in
  your request detail:
  
  
  Your Apple ID.
  The store credit refund amount.
  Your current shipping address.