extra and third view account switch

how can one descibe an expereince that a monopolistic entity holds over its customers. no care. so what, we are the only service provider. if they want the product they will use us! discussing attidute! a new explora and 2 hd decoders were installed to replace the existing extra view on Friday 19/1/18 at approx. 13h00. A call was made to dstv by the installer to activate and switch decoders. since then the 2 hd decoders were not transmitting a signal. the call centre were called twice on Friday, and the call had been escalated during the first call. So, Saterday came on went. five calls were made, all to different call centre operators, ones knowledge and attitude worse than the other, but one. All told me the superviosr will call back within an hour, still waiting. I was proised by all 24 to 48 hurs and the problem would be solved. it is no approx. 30 min before 48 hour have lappsed, and geuss what. yes you got it. no call fro dstv, no signal, NOTHING!!!