Apple id payment

Have you tried signing out of the App Store/iTunes, restarting, and then sign back in to see if that refreshes your balance?

Money transfers can take up to 48 hours to complete. You might need to wait a while longer.

Are you aware that before you can add funds to your Apple ID, you must have a valid payment method on file. Learn about the payment methods that you can use with your Apple ID. ... See how to Add funds to your Apple ID https://support.apple.com/en-us/HT208687  Note that "after you authorize the payment, the funds ... [are credited] to your Apple ID. Then, you can use the credit to make purchases from the App Store or iTunes store. Need more help? Contact Apple support for help here: Get started