if you want to cancel but are unable to follow the steps described in the "how to cancel page", contact adobe support.
there are 2 ways to contact adobe; chat and twitter:
chat: use a browser that allows popups and cookies, and click here, https://helpx.adobe.com/contact.html?rghtup=autoOpen in the chat field (lower right), type AGENT be patient, it can take quite a while to reach a human.