Re: new method of payment.
I am entering everything right but doesn't do anything. It says the Expiration date is not correct.
If the expiry date is valid : we can try some trouble-shooting:
Your Apple (ID) Account is the one account for everything Apple:
Check you are signed in (to your device) with the correct Apple ID you use for purchases.
Sign in to your Apple Account - Apple Support
If you haven't already :
You may want to check which payment methods Apple can accept in your country or region:
Payment methods that you can use with your Apple Account - Apple Support
If necessary: Find out how to pay an unpaid order.
If a message says 'billing problem with previous purchase' or 'verification required' - Apple Support
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Credit & Debit cards: You may need to add a new card before you can remove an old one
Apple Support's guidance on how to: Add a payment method to your Apple Account - Apple Support
or: What to do:If you need to change or update your Apple Account payment method - Apple Support
If needed: How to: Remove a payment method from your Apple Account - Apple Support
Also: Apple Support have a video online that may be helpful:
https://www.youtube.com/watch?v=aKHOJFWOJHk