Extremely Frustrated

I had downloaded their app and they ask for debit order details, which I gave, they said they will deduct a once-off fee R1 to see if banking details are valid. Now they have been debiting my account every month. There's no way of contacting them by phone. I have left messages through their contact us service. I deregistered and deleted the account but I am still getting debited. Has anyone have a way of contacting them.