Not a value for money

I brought Kuv 100 k6 diesel variant on Oct'2017 wb66xXXXX but after 8th month it has start a starting problem. When I crank the key engine has stop after some vibration. 2-3 time I go to showroom but they are unable to short out my problem. Some time when I plane to go out side hometown I am very scared. I am very mutch fade up.