Factory Fault

Myself and my husband decided to trade our 2009 Yaris in at Halfway Ottery due to limited car space once we were blessed with our blessing. We setup an meeting with Kiyaam Noordien our regular salesman for years. Car was financed by the bank deal went trough, we happy, Salesman is smiling. Leka commission for him. Car was handed over to us at 18h15 after papapers were signed at 15h00. There was just no car in showroom. On arrival of car, no powersteering. Towbar not fitted properly. We had to bring car back the next day to have problems sorted. Complained there after on a regular basis to Kiyaam about s****ing of car over speedhumps, all Kiyaam said he will have it sorted. Its 10 months already. Same problem. Car is with Halfway Toyota since 04 September 2015, all feedback i was given from service team is the previously fitted springs was wrong. They changed it almost 4 times now. Our car is being messed up more. If Kiyaam Noordien acted immediately when complained was logged, matters would have not been so ugly. All Kiyaam Noordien and they guys of Halfway Toyota Ottery can say it can be a Factory Fault!! Not my problem. We pay almost every month just over 6k. Im ****ed!!