Q: HI

You would have had to set up your Apple ID as follows: Create an iTunes Store, App Store, or iBooks Store account without a credit card or other payment method - Apple Suppor….

See this page as well: Why can’t I select None when I edit my Apple ID payment information? - Apple Support

IF it is asking for a credit card under the list of cards, it should have an option which says none. Select that and it should work.

hope this helped !