I have problem with canceling my plan after buying the same plan but yearly payment!

Sorry, but only Adobe has access to your plans.  We on this user to user forum don't.

See here:
https://helpx.adobe.com/manage-account/using/creative-cloud-subscription-terms.html
and here:
https://helpx.adobe.com/manage-account/using/cancel-subscription.html

If you have trouble canceling, please go to Adobe Customer Service (Make sure to sign in to your Adobe account first and allow popups and cookies on your browser. You may not be able to see the chat window if using a VPN.):
https://helpx.adobe.com/contact.html?rghtup=autoOpen will automatically open the chat window.
Type "Agent" in the chat box to bypass the chatbot and be connected to a person.

You can also contact Adobe by X (was Twitter):
https://twitter.com/AdobeCare

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

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

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 (now x):

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.

twitter/x:
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.

To Cancel https://helpx.adobe.com/manage-account/using/cancel-subscription.html
https://helpx.adobe.com/creative-cloud/kb/cancel-duplicate-subscription.html