Nissan Motors — CNG

Address: 400097

I have purchase a car nissan active xv safety from royece auto hub pvt. ltd. show room in borivali (west) mumbai. with cng fitted from show room and i have paid rs. 60000.00 for the cng kid
Now the problem is that every know then my car stop suddenly and again and again i have to start and also i can’t run my car beyond 80 kilometer /hrs speed. show room people tell me to go cng work shop and cng work shop people tell you have to complain to show room. i do not know what to do please see this problem is solve as soon as possible as i am losing my business.
Asif vohra