Seem to have 2 accounts and want to get rid of one with wrong email and payment methods
I have 2 accounts and wish to close one as email details and payment method are changed.
MacBook (13-inch Late 2007), iOS 8.2
Only iTunes Support can potentially delete an account, which will also remove any content that was downloaded on the account : http://www.apple.com/support/itunes/contact/
If you don't want to use the account anymore then you can log into it and remove any personal info from e.g. payment details. If you have any downloads on the account that you want to retain access to then remember the id and its password, you will need them if you want to redownload them, authorise them on a new computer, and download updates to its apps.