REFUND

i bought a DSTV decoder at ackermans on the 03/03/2016, I went home with it and waited for the installer. He came after 2 days then he installed that DSTV and the guy told me that i have to wait for 30 minutes to view my channels. After that 30 minutes i noticed that some of the channels where not showing, they were giving an error message E48-32 or there's a bad weather. I then paid for the monthly services which is R319 after that i kept on experiencing the same thing. I called the guy who installed that DSTV to come back and check. He checked with his machine then we find out that the problem was with the decoder, I found a refund slip inside the box which came with the decoder, someone had bought that same decoder before and she took it back. The slip had a cell number of that person, i called her, she told me that she did not manage to install that decoder because it had a technical problem so she took it back to the shop. So now my problem is that i paid my monthly DSTV subscription service for something which was returned before and those people sold it to me. Now i feel someone has to compensate me for the money i paid for the services.