Very bad service I ...

Very bad service I took my bakkie for a service at ford the glen, the consultant who saved me asked if there was anything that i needed to add to the service, of which i asked her if they could check the brakes pads as well as there is a noise on the left side when ever there is a shape turn, which she noted and i was dropped off at my work place... I was called by the service consultant that they picked up that the shock needed to be replaced and the brake pads were ok they will just clean them and all will be good as they were 60 to 70percent. But the shock will be ordered i have to wait for three to 4 weeks maximum. After picking the car i drove a week then the funny noise started again worse, ford head office called as a follow up to check how the car was i told them i wasnt happy as the car was making noise and the brakes seems like they are the faulty the lady i spoke to adviced me to drop the car which i did and was found that the disc and the pads were badly worn and needed to be replaced.. My question is why didnt they pick it when it was being serviced? Their *********** cost me the disc which i could only have spend for the brakes... The cost for the disc suppose to have been on their pocket.. seriously am not happy it looks like they played me so they can make more money, knowing they were told..