Online Booking Frustration

I have been trying to secure a booking using the online system. I started by trying to book at Bryanston - did not receive a call back, email or sms. I then tried a few days later, this time at Northcliff and still no call back, email or sms.

I visited the website and had a chat with a service consultant who recommended I send an email to *** to get feedback. I did so and still no response. It would be understandable if there was a system issue but I am disappointed in Renault SA's customer service seeing as I could not and still cannot get assistance for a simple booking.