Renault Kwid Malfunction

I bought my renault kwid climber AMT in April 2023 the car was fine for a year after that it has been giving me issue for a year now it’s shows a sign of malfunction. It just stops in the middle of the freeway whenever I take to a renault dealer, they do a diagnostic and say all is fine and they would charge me. I’m really tired of this car. I really regret buying a renault. If it was up to me I’d give a negative rating this is really frustrating.