Error 143-4

I’m very disappointed with DSTV I am paying DSTV every month diligently but the service I receive is pathetic. I am paying for service but I can’t use it and have not used it for over a year, on top of that it is also costly to call the call center as this is a cost to the customer. I have no other option as I don’t know what to do in this instance and to constantly get the installer out is also costly as I need to pay him for the call. My setup is as follow: Primary decoder is a Explora Secondary decoder is HD PVR on Xtraview I keep on getting a E143-4 error on the secondary decoder. I called the call center on numerous occasions spoke to Sizakele the last person who attempted to assist. The installer has been at my house numerous time and the problem still persists. One agent i spoke to indicated they will escalate to the Field Technicians. To date no field technician came on board, to a point that Sikelela phone me, and we underwent the same setup assessment as i had done with previous agents including the installers. I have visited the service center numerous time over the year, and twice they swapped my HD PVR, as well as the sim card. But to date, the issue still persits. LAst communication with Sikelela is "May I advise you please take both decoders to nearest DSTV Agency or Service Centre for testing as the smartcard issue was fixed but now we need to know if the current issue is the decoder or installation and in order for us to know that for sure we will need to test both decoders". I have as indicated visited the Service center with new HD PVR being provided to me, but the issue still persist. I responded to Sikelela Vuzane on 12th December 2017, and haven't received any feedback. Is it possible for DSTV to have their own technicians whom we do not have to pay a call out fee as this is costly, especially when the installers cannot assist with the problem. The call out fee is not R50, it is close to R600 per hour, and even so, when the installer come through they want to use the consumers airtime to call the call center and as a consumer i am sick and tired of paying for services not rendered. Can someone please assist, as R989 per month for premium account but no benefits for premium account is a waste of money.