Scrambled (customer) service!!!

Last month I contacted Dstv to advise them my service keeps disconnecting. I made 4 calls after each other and every time I had to explain my problem to a new agent. I have an old dual view decoder and according to the agent, if I don't have the 2nd tv connected, then it'll continue to scramble the 1st one. I told them I no longer have a 2nd tv, but she said it's fine she'll activate on their side so that I have an uninterrupted service. She also told me she'll make a not on my account so that I don't get charged the additional subscription. Thankfully her solution worked and my service was uninterrupted for the rest of the month. Sadly though, she never made a note and now in this new month my problem is back, however, no one at Dstv seems to know about this issue pertaining to the old dual view decoders. I've asked them to retrieve last month's calls, but it's already been 2 days and no one has gotten back to me. I also had to pay for the 2nd tv which I don't even have, but I need this option for my 1st one to work. I feel so defeated here...and exploited - someone...anyone...please help me!!! :-(