Oddbarn if you wish to cancel your annual membership then please contact our support team directly at Contact Customer Care. You can find additional details regarding the process at Cancel your membership or subscription | Creative Cloud - http://helpx.adobe.com/x-productkb/policy-pricing/cancel-membership-subscription.html.
The Email ID in forum does not any CC for team associated for itself. As mentioned in previous post, the program Admin has the right to add or cancel seats, if it is direct purchase then Adobe then please contact Adobe Support for the same.
If purchased from re-seller, then you can also contact reseller.