Why cant I downloaded apps all credit card I enter it denies it
I cant download any apps and my billing information it always gets denied
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Did you already try the troubleshooting steps mentioned in this article?
If your payment method is declined in the App Store or iTunes Store - Apple Support
If your payment method still does not work, you should contact the official Apple Support and ask them to look into that issue from their side.
You can use this link as a start: