If your refund is approved, the funds are applied to the same payment method that you used to buy the item.
Here's how long it takes for a refund to appear on your account or statement:
Store credit—It might take up to 48 hours to see the refund in your Apple ID balance.
Mobile phone billing—It might take up to 60 days for the statement to show the refund. Processing time might be affected by your carrier. You can contact your carrier for an update.
All other payment methods—It might take up to 30 days for the statement to show the refund. If you don't see the refund after 30 days, contact your financial institution.
I figured what the problem is, my grandson purchasing from his phone, I forgot or did not realize that my debit card was still linked to his phone, I need all those transactions refunded, because they have caused my account to run negative, and I’ve collected bank fees, I cannot see his purchases from my phone. Please help me
Use one of the methods posted above to ask for a refund; if granted, it'll take up to 30 days. The iTunes Store doesn't impose overdraft fees; these need to be handled with the bank.