False promises

I was contact by Onair TV and promised that there would only be an additional R100 added to my current account. I am now paying two full subscriptions, for the dualview that was removed from my home and replaced with the two new decoders. When the installed came he mentioned that I was going to be charged double, as other customers have the same problem. I confirmed with a Michelle lady at Onair that is not true. When my system was turned off due to lack of payment. I contacted DSTV only discover that I am required to pay for two full subscriptions. I spoke to a Nadia lady at Onair, she said that she would listen to the voice recordings and get back to me, she did reply to me after my first contact with her, but now for two weeks nothing. I have left two messages for her no reply. They are making agreements with customers without understanding what are the current customers setup is. I still have not received a copy of the contract, which has also been requested on several occasions.