Struggling with “Payment Not Completed” on the App Store? This video shows you step-by-step how to fix payment not completed on App Store quickly. App Store payment failed errors usually occur due to outdated billing info or connectivity issues. It affects iPhone and iPad users facing App Store purchase not going through or App Store purchase unsuccessful messages. ➤ fix App Store payment not completed on iPhone ➤ resolve payment not completed error on App Store iPad ➤ update billing information in App Store on iOS ➤ verify payment method on App Store iPhone ➤ troubleshoot App Store purchase not going through on iPad ➤ reset network settings to fix App Store payment failed on iPhone ➤ clear App Store cache to resolve payment not completed issue ➤ contact Apple ID support for App Store payment issue on iPhone Applies to: App Store on iPhone and iPad.