Tvs Motor Company — scooty prep plus

I have purchased a scooty prep plus few months back and recently it ran into a starting issue. Often the engine doesn't crank with both kick and self and sometimes on the go when i am trying to accelerate, the engine dies off.
It has become a very serious issue as the vehicle is my prime mode of transport and to my surprise the service center attached to my tvs showroom is practically of no help. All they are saying, they are not able to recreate the problem and their is no fault in the scooty. I have checked with multiple sources and there are a bunch of probable causes for this but the service center is not attending me at all.