The recurring payments are also mentioned on the buy page and several other places very clearly.
-Mike (I don't work for Sparkol)
If you click the ACCOUNT link at the top of the page you can probably find the link to cancel your subscription.
You can raise a ticket to ask customer support about a refund.
-Mike (videoscribe user)
Many businesses do not work on weekends, So you will probably receive a reply sometime Monday during UK office hours.
I have responded to your support ticket regarding this. Please check your email for further information.