How to use a promo code to download app or unlock features for free?
macOS App Store: Menu item Store -> View My Account -> Redeem Gift Card iOS App Store: Your Account -> Redeem Gift Card or Code In...
How to get help?
1. Click the app icon that you want to get a help with 2. To leave a message in the comment box located at the bottom of the app's...
How to get a refund from App Store?
https://support.apple.com/en-us/HT204084
