Renault Trying to kill me

Took my car in because it kept shutting down out of nowhere it would show engine failure and stop in the middle of the road I was told it’s. Wiring problem and it is not covered under the warranty , they only found problems that the warranty didn’t not cover, and they failed to explain to me what exactly does it cover they did my 30k service and didn’t not replace the break fluid cap I honestly think this kind of incompetence is what gets people killed I noticed called they advise Courtney was not in she was the service rep drove back to them the technician advised the car came without a lid what a damn lie as I had recently bought the car and I am 100% sure the lid was there