I shall be taking my complaint as far as I can now because what they do is illegal. I cancelled my subscription but received a notification saying I'm due for renewal this month. I tried to cancel my subscription and have videod myself doing it. However it keeps taking me back to the Cancel Subscription page so I can only assume it hasn't been cancelled.The only help email I've found is *******@venntro.com so have sent them an email. The website is a con and he just wants your money.
Updating to add: I contacted the ICO about this website and the ICO told me every UK website has to have a clear contact method. I've finally been told that I won't be billed again but it's not clear how to completely delete my profile and I think this website is taking liberties so I will fight for a clear contact method to be added so that others don't have to spend ages trying to get in touch with them.