Poorest Service

We bought a Nissan X-Trail 2017 model in May this year from Nissan Group 1 Strand. On the 27 of October the car made a strange noise and it just died my husband and his friends got the car back home. On the 28th of October we call Nissan Kuilsrivier and ask them to send a towing but they did not have that services we arranges with our Insurance and within an half and hour they got the car to the dealership. They told us that it will take a month for them to fix the car when we ask if they can give us a courtesy car they told me that they do not give courtesy cars for cars that is older than 3 years. I contacted Nissan SA and everytime they gave feedback it was this and that and I still don't have a Car. I ask Nissan SA to follow-up on our number plates and it came back that the car was never send for Roadworthy. After almost 2 months without my car the dealership send me a mail today telling me that they have the car it must go for engine clearance and I need to pay the R800 for the engine clearance because the warranty does not cover that. Can somebody please tell me what I can do because I am not paying that money because I paid them over R300000 for the car and this is the Service I am getting for one of South-Africa biggest Car Dealers. I really would not recommend anybody to buy a car from them because they don't care about there clients and the client service is very poor.