How to stop my registration ?

Adobe automatically renews subscriptions. There is no way to turn the automatic renewal off.

You will need to find out the end date for your subscription and manually cancel it during the last month, or cancel early and pay the early cancellation fee.

This is a public forum, not Adobe support... you do NOT cancel here

To Cancel https://helpx.adobe.com/manage-account/using/cancel-creative-cloud-subscription.html
-FAQ https://community.adobe.com/t5/account-payment-plan/cancel-subscription-faq-s/td-p/11843852
-do be aware that cancelling early means paying 1/2 of the remaining time as a fee
-or cancel via Chat link https://helpx.adobe.com/contact.html?rghtup=autoOpen

Be sure to remain signed in with your Adobe ID before accessing the link
Do be aware that Adobe's staffing is impacted by the virus, so wait times are long
-make sure that your browser does NOT block ads, scripts, or pop-ups
-you must also allow 'cookies' in your web browser for the link to work
This link will go directly to the chat option
Type "Agent" in the chat box to bypass the chatbot and be connected to a person
-Meaning type in the word Agent without the quote " " marks

Also: beware of answering anyone who sends you a private message
-click for more information about scammers https://tinyurl.com/10791730