I charge some money into my App Store account.
Do you mean you add funds to your Apple ID balance?
If so, see -> Check your Apple ID balance -> Check your Apple ID balance – Apple Support (UK)
Then see -> Change, add or remove Apple ID payment methods
Change, add or remove Apple ID payment methods – Apple Support (UK)
- and set your Apple ID balance as your default payment.
If you update your payment method or add funds to your Apple ID balance, It would take about 1 to 3 business days in order to process.
If you're still unable to update your payment method, Contact Apple Support.