billing issue

in addition to chat (the best way to contact adobe support) per @Jeffrey_A_Wright, there are 2 other ways to contact adobe; phone 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.

phone:
https://helpx.adobe.com/contact/phone.html

twitter:
tweet @AdobeCare

p.s. if you're contacted by anyone (via email or private message), it's much more likely to be a scammer than an adobe representative. ie, double check for an employee badge if contacted in the forums and look for an adobe.com domain in the email address if you click reply to an email. then check again and be very suspicious. any other method of contacting (or offering to contact you) is almost certainly a scam, https://community.adobe.com/t5/using-the-community-discussions/staying-safe-in-the-adobe-support-community/td-p/12919684/redirect_from_archived_page/true

Alena, sorry for any confusion. If you have any questions about fees charged for your membership for completing the steps listed in https://helpx.adobe.com/manage-account/using/cancel-subscription.html then please begin a secure chat session at https://helpx.adobe.com/contact.html?rghtup=autoOpen so a member of our team can help you.

Nothing is hidden, you should start here: https://helpx.adobe.com/contact/phone.html

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