To change the card for payment. The answer is: is

See this article.

If a message says 'Your account has been disabled in the App Store and iTunes' - Apple Support

You need to contact Apple support to resolve a payment problem with your account. See this support link→Your account has been disabled in the App Store and iTunes

hey man i've seen you on these threads i need your help badly. it's my only post i e ever made you should be able to find it easier than i can