My kwid is a nightmare to drive

This is not a review, more so an enquiry as I have been unable to get clarity on my issue. I drive a 2018 Renault Kwid AMT. I started experiencing a problem where the car would just switch off mid-driving. I took it in to Renault Centurion. They first said it was the battery, changed the battery and the car was still doing the same thing. They then said it was the petrol pump. When we enquired further they said the car was now fine. The car drove without any issues but now has started again. The car just switches off mid-drive in the middle of traffic. It does not slow down or give any warning but just switches off at whatever speed. Needless to say how dangerous this is. Where can i get assistance for someone to help me with this issue? Is there anyone else that has experienced the same issue??