Poor service delivery

My wife's car was bought from Renault Kempton park. The vehicle were unable to turn sharp and this was reported to them immediately along with another problem. It was confirmed nothing was wrong, however on the second service they confirmed there is a problem with actually became worst over time. Now, one window is not working, aircon is making noise and the sharp turn issue. Apart from that, we are waiting for the vehicle to be returned with 2 different dates scheduled for pickup. 9 days and still waiting. Very very poor assistance and the Renault Kiger is a very poor vehicle to buy.