Unauthorised debits and blatant refusal to refund

Although I don't like saying it, Shaw Academy are a bunch of *******. I have had the worst experience with them where I was debited on 2 occasion for R499 and R1999 and told I cannot get it refunded. We signed up for a free course and the website insists on adding bank details ofcourse. A few days later, Im charged R499. When emailing them to query it, Im told that I purchased course material. They then offer a free certificate and a further 3 months free subscription. The next week I am charged R1999 and after emailing them they call me telling me purchased a 12 month premium subscription at a discounted rate. I tell the caller that I did not purchase this and it doesnt make sense especially after I signed up for a free course, was given an additional 3 months free. Why would I now decide I want a 12 month premium membership. The caller tells me I cannot get a refund because the subscription has already been made available to me, but he can offer me 24 months free membership. After rejecting his offer and telling him that I dont want to another class with them and I dont want to anything to do with Shaw Academy - he offers me a lifetime membership - clearly not hearing me. After telling him that I am going to review and Shaw Academy online and tag them on social media, he offers me a 50% discount. How ridiculous. Why would I only want half of my ****** money back. I want all of it. He said he will check their call logs to see if there is a call where I am requesting a full membership (I wish I could add emoticons right now). I was told that I cannot speak to a higher manager. So the guy that called me is going to go look for a call that didnt happen and I will be left here R2498 short. After all these encounters I am convinced that Shaw Academy do not operate fairly and legitimately.