Bad Customer Service

I had a break down with my car onMonday the 28th.Renault Assist came on Tuesday on the 29th July in the morning before 8am and towed my car to Zambazi Renault.Up to 3 o'clock there was no feedback.I got a call just before 16;00 and told that my car was not attended as they were busy On Wednesday no feedback and I had to call them to enquire about my car.I was told they are busy with diagnosis.Up today Thursday they are still busy with diagnosis of my car.Just wanted to know how many days does it take to diagnose the car. What a bad communication I experienced. Every time I will be asked one Question.''What is wrong with your car? How can they still ask me that question today if they are busy with diagnosis from Tuesday? Can you please intervene as I am using Uber on daily basis to work