DSTV conning and bullying their clients

I currently pay DSTV to be able to view the channels that I am paying for. DSTV are not giving me what I am paying for, because they constantly reboot/rescan my decoder. It happens normally at prime viewing time. DSTV reboot/rescan my decoder sometimes for hours and days on end. This leaves me without the service that I am paying them for. I have enquired with DSTV about the reboot/rescan that they do, and they tell me that I have to upgrade my SD PVR decoder to a new Explora. My decoder is in perfect working order and DSTV wants me to purchase a new decoder from them even though my decoder works perfectly. Why is DSTV being allowed to bully their clients to purchase their new products if the client does not need it? This is plain thievery. Exactly what Apple did when they slowed down the old Iphones when they released a new model Iphone. Why is DSTV getting away with this?