i enter the credit card number it say invalid credit card

Create or use your Apple ID without a payment method: https://support.apple.com/en-ca/HT204034

Change or remove your Apple ID payment information: https://support.apple.com/en-ca/HT201266

Why can’t I select None when I edit my Apple ID payment information? - Apple Support: https://support.apple.com/en-gb/HT203905

Pay an unpaid balance in the iTunes Store - Apple Support: https://support.apple.com/en-us/HT203005

Payment methods you can use in the iTunes Store, App Store, and iBooks Store - Apple Support: https://support.apple.com/en-gb/HT202631

Contact - Official Apple Support: https://support.apple.com/contact

Will not take expired date or code on back

Takes # but not th way rest

If the code or date on the card is expired, it's not a valid credit card.