Thanks for posting, @한창민.
I am sorry you did not find more value in the usage of our services. I am sorry, but you never completed the steps listed at https://helpx.adobe.com/account/individual/subscriptions-and-plans/renewals-and-cancellations/cancel-adobe-subscription.html so your plan is still active.
Please click on https://helpx.adobe.com/contact.html?rghtup=autoOpen to speak with a member of our team who can help you manage your subscription.
I don’t see any records of any previous attempts to reach us, @한창민, so please use a different device if you are redirected to this public discussion forum.
Equally, if the computer or network is managed by an organization, then you will need their help to reach us.