Pathetic service after receiving upgrade offer

Pathetic Service I received a call from an agent offering me an upgrade of the decoder which came with installation and I accepted. When the decoder arrived, I had to call Multichoice for an installer. The first installer who came told me I need to upgrade my extra view decoder which I did but they never came back to complete the installation. I called DSTV and they gave me contact details of another installer who refused to come until Multichoice gives me an installation voucher because they don’t get paid without the voucher. When I called back Multichoice to ask for the voucher, I was told I need to pay for the installation – I refused. They then said I need to go to a Multichoice office, I refused as this is not part of the deal. Andile the agent I was talking to refused to put me through to their manager and also refused to give me a reference number for the call. He just told me to do what he is saying if I want my problem solved. This is pathetic service particularly because the offer was extended to me.