Payment method on Apple store
How do you disable my Apple account?
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Are you trying to disable your account or your account is disabled and you want to enable it?
Apple ID disabled - Your account has been disabled in the App Store and iTunes
Contact iTunes Support. Either use the form or scroll to the bottom of the page in the 2nd link. Follow through the screens to get a chat or telephone option.
To disable it, just stop using the account.
If you are trying to remove your payment method.
Apple ID without a credit card
Apple ID - If you can‘t choose None when you edit your Apple ID payment information
If none of the above is what you want to do, more information would help.