In the App Store it says my account is disabled in the App Store where I can’t download anything

If you see a message that says "Your account has been disabled in the App Store and iTunes", contact Apple Support for help.

Or update your payment information.

👉 Sign in to your Apple ID account page and edit your Apple ID details.

https://appleid.apple.com

On the Sidebar click Payment methods -> then tap Payments Methods and tap Manage payment method.

Or -> Change, add or remove Apple ID payment methods

Change, add or remove Apple ID payment methods – Apple Support (UK)