I purchased a new pulsar 180f

I have purchased a new pulsar 180f on April 08th2019 from a authorized Bajaj showroom in Hyderabad. From the second day of purchase I am getting some trouble with the bike, for example it may be self start trouble and air lock. The bike gets power down by itself when i am riding it. Whenever I get trouble the showroom people are keeping vehicle for one day and making some repairs and adjustments to it and handovering it back to me. But still I get the same trouble for the third time in a month of span. This time the vehicle power off by itself in the traffic and no showroom service team responded so I got some help with near by mechanic and took bike to showroom they again took vehicle from me kept for 2 days with them made some repairs and they are Sticking back it to me. They are not ready to replace the vehicle. What am supposed to do to get the vehicle replaced? And the registration of vehicle is recently done number has been allocated. Please give me suggestion to get the vehicle replaced if there is any such law let me know.