Service department not delivering on promise

On the 28th of April we took our Renault Clio in for a service to PMB Renault. We listed the problems that needed to be sorted out as well as the service. Two of the problems the rear lamp cover that was broken and the indicator that was faulty. I was phone back on the 28th by the service department on the 29th and was told that the total cost for parts would be R8000 and this needed to be paid before the order for the parts would be placed. I was phoned back on the Tuesday and was told that the car was ready however that the back light cover was not received. The supplier only had the one and that this part was broken. We told the service department that they must please order the part, parts department assured us that this would be done. On way home indicator become faulty again. Service department was informed told to bring the car back. Took the car back with understanding that part was there and indicator would be sorted out. No part ordered. Indicator apparently only lose connection. Renault said as soon as part arrive they would come and install part at home/work. To date no feed back - indicator still faulty. This after promised was made that they would sort the problem ou