You should be able to change whatever email address if you have associated with your membership following the instructions here: http://helpx.adobe.com/x-productkb/policy-pricing/account-password-sign-faq.html
Hope that helps,
We do not advise to change the E-mail address (Adobe ID) as it do causes accessibility issue for CC.
You can cancel this CC (with no penalty) & buy another with the correct ID.
You just have to log out & log back in of the Cc desktop App to activate the new CC.