cancellation of plan lead to immediate top of subscription ?!!

that's adobe's policy for annual subscriptions paid monthly.  if you want to cancel just prior to plan renewal, set a reminder.

here's more info about the cancellation terms: start by selecting your plan type (at the top of the page here), https://helpx.adobe.com/manage-account/using/creative-cloud-subscription-terms.html


and for info on how to cancel your subscription, this page describes the few steps involved, https://helpx.adobe.com/manage-account/using/cancel-subscription.html

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.