Bad Service on parts

I had to replace a part in May 2017. I paid for the part and they did the work. The car ( a Renault Clio4) was still jolting to the left and I got a Check ESC error and every time I phoned them they told me that it is wheel alignment. In December 2017 I took the car in for a service and I asked them to check why I keep getting the Check ESC error. I was told that it is caused by the same part I had replaced and that they will replace the part. I waited four weeks for them to come back to me as to when I can bring the car in. I phoned every day and even went there in person to speak to them, they just said that they are waiting for head office to approve the work to be done. The day finally came that I took my car in to get the part replaced. I was phoned and was told that there is a new problem and they are waiting for head office to approve the work, the new problem was caused by a faulty part ( this is the same part that I paid for in May 2017) and that I will only get my car back in 2 - 3 days if head office approves the work. This caused a major problem as I do not have other means of transport, they told me that they do not have any loan cars to lend to me. I am now waiting for Renault to phone me in connection of if the part is going to be replaced or not. In the four weeks I had my car where they took pictures and inspected the car and said only the left control arm needs to be replaced. I am wondering how good the service is that they did not pick up the other problems while they took picures and inspected the car when I had the car there. They also never returns any phone calls and if you are lucky enough to get someone to answer the phone it takes for ever to speak to the service department