Unauthorized payment, and now refusing to refund

I am registered for a Leadership course and when I registered, I was asked to add my credit card information to prevent people enrolling for multiple trial courses. 2 weeks later, R400 was debited from my account and I received a message that I am able to download a copy of Assignment 1 certificate, but the certificate doesn't even have an ID number, so it is just a useless document. A week later, I received a call offering me 3 months subscription for R999, which a declined but as we were still on the call, I received a message from the bank that R999 had been debited from my account, when I asked the guy, he apologized and said he will request a refund.

That is when the nightmare started, because Allen send me an email asking me which courses I want to enroll for, and when I told him it was a mistake from the agent and that I need him to refund me, I got told stories. I was told from they took the money because trial (28 days) had elapsed (but I was on 16 days). When I challenged that, I was eventually told they can not refund me, and I must accept a lifetime membership, which is not beneficial for me because I no-longer have an interest in pursuing the course. Now I cant even delete my credit card details on the profile and they are refusing to refund my money back.

NB* If they haven't done it to you yet, run while you still can, because you will regret. I now even doubt if the qualification is legit because I have never been asked to capture my ID number, so what is a certificate without personal details, who will recognize it, how will they verify it is yours.

Run people run