Bad Experience

I had my car towed in at Renault Fourways on the 30th March, after which I traded it in for a demo Clio. I fetched the Clio on the 1st April, on the 3rd April it was towed away. Till date I don't have concrete feedback as what is happening with my vehicle. I paid insurance now for my car to sit at the dealership, if it's giving me problems so early on how will I be certain that I won't get any further problems. With the service department being so terrible at keeping the customer in the loop and assurring me as a client that all is in order how do I comfortably driving a car that has been problematic from day 1. Yes I have a courtesy car but it not my car. It seems I am being loyal to a brand that will do nothing for me in times of a crisis. Your saleman was great but the service department is letting down people like him who work hard to bring in sales.