Have been charged $19.99 on my debit card on 09/08/2014. I don't want to continue membership anymore because I barely use a product purchased a year ago. Please refund my money. tried to cancel membership but the system sent me to this forum

It isn't likely that anyone will be able to help in this forum since most are users like yourself it is doubtful anyone has the ability to process business matters.  You might need to wait until after the weekend to process cancellation.

Cancel your membership or subscription | Creative Cloud

https://helpx.adobe.com/x-productkb/policy-pricing/cancel-membership-subscription.html