Isuzu Richards Bay is ****ing the Isuzu brand

I’ve been in and out of isuzu dealer with the same problem of the engine light coming on and loses power .i’ve been charged 3 times by the dealer for the same thing .The second time when i took the car to the dealer they again took it to a private auto electrician and turned around said i took the car to auto electrician Deon and Natalie don't have clue on what they are doing and don't know what is customer care,i was charged 3 times for the same fault but my car is still under warranty .Last time i took my bakkie in for a service they charged me R9800.00 . Even isuzu HO couldnt help as they said they are only taking the dealers word