Frustrated over Renew-It Poor Customer Service

I took my car to Renew-It Randburg on Thursday for the top-up coolant light that keeps popping up in my car <br> <br> I was told a full diagnosis will need to be done to determine what is causing the light to pop-up over and over again and asked to give then until Friday to look at the car<br> <br> On Friday around lunchtime, I had not heard from them - I then called to find out when my car will be ready, Bryan was not available to take my call so I left a message for him - then 5 minutes after I left the message for Bryan