Nissan Group 1 TAT is bad

Car was showing engine light, took it to Nissan last week Wednesday the 28th. Engine needs replacement according to them. Long weekend past and I accepted on Tuesday the 2nd for them to go ahead with the replacement. Friday I waited for their call, nobody called. Until now I have been waiting for their call, instead I have been calling them. They charged me R153k and in the meantime I don't have a car, they cannot even offer me a courtesy car or anything. The warranty company needs to assess the car but they need to strip it, it is taking them 3 days to do that. As I am writing this, that is where we are, they are still stripping. I am not happy at all, bad service and no prioritising. Took the car to the dealer hoping the get quality results and service but I am very disappointed.