Ошибочно подключилась подписка на год, вместо пробной версии

1. you posted in the wrong forum so @Ann Bens  moved your post to the correct one

2. the adobe trials are one-time offers only.  ie, if you've had a previous trial, you cannot start another one (for obvious reasons).  so, when trying to start a 2nd trial, you immediately start a subscription.

3. 1 week after an annual subscription starts, you are no longer able to cancel without a penalty.  here's more info:

make sure you're aware of the cancellation terms by selecting your plan type (at the top of the page here), https://helpx.adobe.com/manage-account/using/creative-cloud-subscription-terms.html

if you're unable to follow the steps described, you'll need to await help from an adobe employee for the next step.  (if you don't get a reply here from a badged employee within 24 hours, repost.)

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.