Unhappy customer

I am so disappointed with the service I am getting from Nissan my car just stopped working I bought this car brand new it has around 42 000km ,on the 23rd of May 2024 it was taken to Nissan The Glen , a month later I still do not have my car I have to always be the one to do follow ups on what's going on they do not seem to care at all. Even contacted Nissan SA to complain they promised to give me feedback, oh well I am also still waiting this is disappointing I do not have a car that I am paying for I need to hire and pay money for my doctor appointments