Misleading payments
The way the website explains the subscription is misleading and purposely worded so that you believe you are making a one-time payment, while they then set up a subscription you didn't ask for. When you complain and ask to be refunded the £80 they have taken from you for 2 months, you haven't been using it (they can check account activity and confirm you haven't used the website), they will refuse to give a refund and deny all responsibility. For many students, this is a lot of money they can't afford to lose.