Nissan np200 cuts engine when temperatures are above 30 degree's

I have Nissan np*** model, bought it new, when I drive in areas with high temperatures it cuts engine,2018 January it was worse and it was towed to Lionel motors,they charged me even though it was under warranty, they told me it needed to be reset,but the car still does that,wen I drive at night there is no problem in summer high temperatures it cuts,