Car in Renault EVERY TWO MONTHS

I've had my BRAND NEW Renault Sandero in every two months for this whole year! A brand new engine had to be done all the heads and now fault lights are still coming on! Nothing done by Renault - they basically told me if I want to take legal action I can go for it! Will never recommend Renault again and will never buy one again! Broke down with this car on a public holiday and Renault couldn't help - because it was a public holiday - took 3 hours to get assistance.... and