Poor customer service

I called Multichoice contact center on the 23rd March 2024 from my cellphone number *** to request the PVR service to be cancelled. The agent advised me that it has been cancelled and I will not be charged for it from the payment of March. I am stilled being billed for the service that I do not use. I called back to report this matter on the 23rd July and I spoke to an agent by the name of Zonke, who told me that she can listen to the call while I hold on the line. I then requested Zonke to give me a call back and she told that her team leader Lolwethu will give me a call back. It is now more than 24 hours and no one has called me back.