Unauthorised Billing

I was offered membership and at that moment it sounded very interesting and the best offer so I agreed to it, I then immediately changed my mind about the offer and requested that the membership be cancelled and Abongile said she will cancel the membership. On my payday I receive a debit of R1795.00 an amount in which I told Abongile to cancel. When I call their customer services daily, I end up holding for over an hour which still goes unanswered. I sent them an email with this complaint and they assured me that they are handling the matter and will get back to me but to this day I have not receive feedback. I've been calling them daily. The shocking thing is that they respond to emails but they don't answer calls. I want my money back before serious measures are taken into consideration.