Hi, I join the month-to-month membership for Adobe Muse.
I found it purchased me without notification.
I don't want to join the month-to-month membership anymore but I can't as there is no 'cancel plan ' button .
Look thru the following links and use the chat or phone option if required for your situation:
Cancel your membership or subscription | Creative Cloud
Chat support - For the link below click the Still Need Help? option in the blue area at the bottom and choose the chat option...
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800-833-6687 (US daytime only 5AM-7PM PST, Monday-Friday).