I was wrongly been charged for an anual plan that i never baught!!

If you didn't give your Credit/Bank card details to Adobe, who did?  Maybe it was a family member with access to your card?  

At any rate, whoever ordered Adobe services had 14 days to cancel without penalty.  See Subscription & Cancellation Terms.  

Now that the grace period is over, early cancellation incurs a 50% penalty fee.  To avoid penalty fees, wait until your 12th month to cancel.   See correct answer below.

https://community.adobe.com/t5/account-payment-plan/how-to-cancel-my-adobe-plan/td-p/11293343?page=1