DSTV: What service???

I had problems with DSTV Explora secondary decoder for the last month and they just cannot get this right. I have done all the options that I could to get this resolved on my own with no luck. They keep on telling me to get installer to check installation. I have done this in March 2019 and again in November 2019 for the same problems. The red explanation mark does not go away. I have formatted the decoder, changed cables, what more can I say, the same process every time I contact them. Calls take 30 to 40 minutes and still not able to use the system which is paid for. Just useless. They send me to the Centurion walk-in service center during lock down. Would you believe that it is closed fro nearly a year yet they send me to have decoder tested. HAHAHA What a joke.