Updating and adding new payment method

I have added funds to my payment method

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.

See -> Check your Apple ID balance

Check your Apple ID balance – Apple Support (UK)

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

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

• Add first the new card, then remove the old one.

Get more help, contact Apple Support.

See the Apple Support article(s) below. Link to contact Apple Support in the article. 

Apple ID payment information - If your payment method is declined, or you have a billing issue with a previous purchase in the iTunes Store*

Possible fixes.   Fix ‘Your Payment Method Was Declined’ Error In App Store.  -

                          Payment method declined in iTunes or the App Store.   -