Renault Centurion and Renault SA - Disgusting Customer Service

I was at Renault Centurion on Friday 27 Nov as the computer in my car was saying CHECK TYRE PRESSURE SENSOR (front left tyre) and they reset the computer and said that's all that was faulty. When I drove out of the dealership the computer started flashing once again. I then went to a Tyre fitment centre and they said there were two leaks in the tyre and it would need to be replaced immediately as it was dangerous to be driving around with a tyre in this condition. I had the tyre replaced as I was worried that driving on this tyre would cause a puncture and my life would be in danger, Renault Centurion didn't seem to care that the tyre needed replacement and sent me off without doing a thorough check (they stated that they do not have a machine to remove tyres and thus couldn't check the sensor either). I went back to Renault Centurion on 30 Nov as the computer began flashing again for the rear left tyre and asked them to please check all the tyres and sensors as the computer is constantly telling me to check the tyre pressure.

They proceeded to tell me that they want to replace the sensor but it will fall out of the WARRANTY because I replaced the tyre. I am not sure what they wanted me to do, to drive on a faulty tyre and have an accident and put my life in danger? I have only had the vehicle for about 6 months so I find this totally unacceptable and very inconsiderate of Renault Centurion to send me away with a life threatening fault on my vehicle and now say that Renault will not cover the cost, should I have rather driven around waiting for an accident or my tyre to burst, just to save my warranty?????!!!!!!

I have sent an email to Renault SA complaints on 1 Dec and called them telephonically on 2 Dec to follow up. I am still waiting for ANY KIND OF RESPONSE and in the meantime driving unsafely!!! My next step is Motor Industry Ombudsman or anybody who will respond.

I have owned three Renaults in the past and I decided to go back to Renault for their "wonderful" service but right now I would give it back if I could and rather buy another brand who will give me better service and treat me like a valued customer and not just a way for them to make money!