My payment account in app store is disabled, why?

Apple has a specific contact method for this issue. Read this document --> If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support

If you see a message that says "Your account has been disabled in the App Store and iTunes," there may be a problem with the payment method that you have on file. When you see the message, don't try to edit any of your account information. Instead, contact iTunes Apple Support for help.

https://support.apple.com/itunes