How to take billing off Apple ID
How to take billing off on my Apple ID and download apps
iPhone XR, iOS 13
See If your payment method is declined in the App Store or iTunes Store https://support.apple.com/en-us/HT203005.
Also see: Fix ‘Your Payment Method Was Declined’ Error In App Store https://www.addictivetips.com/ios/fix-your-payment-method-was-declined-error-in-app-store/
If you need additional help, use this support link from the document https://support.apple.com/contact or use:
Apple telephone support for help in solving your problem using this link https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362 Be patient sometimes Apple support is closed to immediate phone support.
Apple Support Twitter https://twitter.com/AppleSupport There may be an hour or so wait.
iTunes worldwide support via text or chat using this link https://support.apple.com/choose-country-region/itunes After choosing your country, see the heading Tell us how we can help.
