Cancel your membership or subscription | Creative Cloud
https://helpx.adobe.com/x-productkb/policy-pricing/cancel-membership-subscription.html
Phone support | Orders, returns exchanges
http://helpx.adobe.com/x-productkb/global/phone-support-orders.html
For the link below click the Still Need Help? option in the blue area at the bottom and choose the chat option...
Creative Cloud support (all Creative Cloud customer service issues)
http://helpx.adobe.com/x-productkb/global/service-ccm.html ( http://adobe.ly/19llvMN )