Nissan South Africa - Nissan NTT Compaint

We Purchased a Vehicle from Nissan NTT Bloemfontein and requested a full franchise service history and accident free vehicle. We later discovered the car was not fully serviced, and not all were Franchise services. The car was also in an accident. We have numerous complications with the Vehicle, and it is unsafe for our Family. We have lodged formal complaints, but we have been receiving different reports, history and Invoices. Nothing corresponds, and they are unwilling to resolve the issue