Non Existent Service

I have been with Multichoice for many years and have never experienced any problems with customer service. This is why it blows my mind how a company like Multichoice can associate themselves with a company like On Air Tv where customer service is non existent! Their sales consultant contacted me and assured me that the Explora that I am buying from them would have the same functionality as my PVR did. Needless to say upon installation I realized that this is not the case. I cancelled the contract on 10 September 2015 and informed them to collect their Explora. I had to buy a new Explora. Uninstalled and disconnected the Explora received from them. After numerous telephone calls and emails I have not received any response. I was informed that I cannot speak to any manager at On Air alternatively, they are non-existent. After informing them that any deduction from my account would be unauthorized, they deducted and I had reverse the transaction. Why would Multichoice associate with such a company? I don't know where else to turn and seems that I need your assistance to sort this matter out with On Air Tv as this has been ongoing since 10 September 2015. PLEASE HELP!