How to get rid of credit card from apple account?

Apple says there was a billing problem with my account. I just want to get rid of my credit card from that account. I'm on my iPhone 5 and i don't know what to do.

Click Store from the App Store menu bar then click Sign.

Enter your Apple ID and password then select Account under Quick Links right side of the App Store window.

You may be prompted one more time for your password to view account info where you can edit the payment type.