Beware MultiChoice Sales Pitch on Ultra Decoders

At the end of last year I was offered a deal on a new Ultra Decoder for R999 per month over two years. At first I was charged correctly then it went up to R1198 per month. I phoned in and was told that the extra amount was for Netflix. I told them I already paid for Netflix privately and proved it by sending in a copy of my credit card statement. Netflix allowed me to watch it on 2 tv's. They dropped the charge and then upped it again. This happens every month. Last month Siyahluma from the call centre told me that the minute you press the Netflix button on your remote you are charged. The charge was reduced and I told her I would only watch Netflix on the other TV by down streaming. One week later the charge is back up to R1198 without me ever having touched their remote. I have requested a copy of the sales pitch as none of this was pointed out to me. I believe they are not being truthful with their sales pitch but can't get beyond the call centre. Help??