Showmax Billing Despite a Cancellation of the Contract and Refusing to Refund

I responded to misleading or confusing advertising in February 2021 and signed up for a cell phone contract. They would not cancel the subscription and refused to refund me. I don't watch movies on the small screen of a cell phone. I asked them to cancel the subscription on 27-2-21. Then I was billed again. I have sent the organization a copy of the Live Chat transcript which they have not got or have not bothered to read and they have not acknowledged the cancellation request from 3 months ago. They have not reversed the payment. There have been several emails to advise me that my contract was cancelled but that there is a "30 day billing cycle" so I can keep watching to the 26th of June. This is despite that fact that I have not used the contract at all. They are ignoring my requests for a refund. It is only R39 but that is not the point, the principle is refusing to cancel my contract and then to keep billing the customer. I will never use Showmax again.