Shaw Academy, refund my money

Sometime last year (2020) I registered to do a professional diploma in data analysis with Shaw Academy, the first two modules went really well and I enjoyed it. But things started to change when I had to do module 3, I could not access the online classes, I sent countless emails and some were not even responded to but every month like clock work money was being debited from my account but I was not getting any class work done, I later decided to cancel and it states on registration that we can cancel at anytime, I followed the cancellation steps and everything went well. The whole of December, January and February I was not debited and all of a sudden this month (March 2021) I was debited R399.00 from my account for services I have cancelled and have not been using for a few months now. I have sent an email with regards to this but I still haven't gotten any word from them as to why I was debited when I have cancelled the whole thing. I want my money back, and I'm not happy as I feel they have ****** my money from my account as I haven't permitted them to take that money and I have not registered for any new causes.