Incorrectly debited due to poor (non-existing) customer service

I have been trying to call them for weeks on end, also requested to be phoned back. Managed to speak to someone but she was unable to assist or take action on my behalf due to limited access to information from her side. I have sent numerous emails with required documents - and still no communication from Discovery. I have now been incorrectly debited due to poor (non existing) customer service. I'm extremely irritated with the fact that I've been listing to the stupid song while holding for hours to speak to a consultant and still not getting through to anyone. WHAT IS GOING ON DISCOVERY!