Poor Customer care service from Renault South

I have a Renault Kadjar 1.5 dCi Dynamique, the infotainment system which includes the radio, navigation, rear park camera, parking sensors is not working, it switches off/on when it feels like and does not switch on when you want and at times you can't reduce the volume of the radio when it is on as it freezes and the touch screen does not respond.

I took in the vehicle to Bryanston Renault and they said they were going to do a software update for the R-Link 2 software which failed as the vehicle could not update satisfactorily.

I was told Renault Head office was going to provide an updated version of the software and 2 weeks later, I am still waiting for the software. I have tried calling the Renault Customer Care number 0861 736 2858 and no-one responds despite trying to call numerous times. Renault Bryanston just keep on telling me that they are waiting for the software from Head Office. Is there anyone out there who has faced similar problems and managed to resolve them? Please assist.