Poor Service: Looking for a refund

Poor poor service. They are a bunch of ********. I subscribed and paid for 1 month, I then cancelled my subscription and was asked to call their service desk, which I did. Spoke to a lady called Lee-Roy Hartzenberg, she then said because am cancelling mid month and have already been charged she would like to offer me a free trial to continue with the course. I then told her that I doubt I will have a chance to use that but she can send it through but however I am still not changing my mind about the cancellation of the subscription, I still want it cancelled. I even removed my credit card details from their site. Two months down the line, am still charged for the course which I had indicated that I am cancelling. Now they are busy telling me about their terms that one needs to cancel the free trial before they get charged. How do I get a trial that will still lead me to being charged by the company yet I made it clear that I was cancelling the subscription irrespective of Lee-Roy offering to send me a free trial which she didn't even mention those terms and conditions for? I am an un happy client and I would like my money back. They dont even deserve the one star I have selected.