Cant see subscription to cancel ?

I signed up for the free trial on Avast for the driver update but I know longer want this service. I cant see on subscription to cancel.

I have an activation code showing the actual avast program but no option to cancel on there so I view online but my subscriptions are empty and cant see how to add activation code to my email to be able to cancel.

https://support.avast.com/en-ww/article/Sale-Billing-FAQ