Issue with adding payment methods on Apple Account

Re: Apple Account: My payment method is not working I have add many card

Wondering if you are seeing an error message that explains what the difficulty is.

Check you are signed into your iPhone with your correct Apple Account details:

Sign in to your Apple Account on the web or in your device settings - Apple Support

Check what payment methods Apple can accept in your country or region

Payment methods that you can use with your Apple Account - Apple Support

See how to add a payment method: Add a payment method to your Apple Account - Apple Support

Scroll down in the above linked article to see what to do: "If you can’t add a payment method"

If you are trying to remove an old card in order to add the new card ... for an account with active subscriptions:

you would need to add the new card first, before you can remove the old card.

More info. if needed:

Find out how to pay an unpaid order.

If a message says 'billing problem with previous purchase' or 'verification required' - Apple Support