Complaint on Yamaha perfect riders bangalore.

4 months back i had purchased Yamaha fz-fi bike from yamaha perfect riders bannerghatta road Bangalore, 25th Nov 2016 i had done second service.next day i started my journey towards my native its about 600km. i was reached around 250km suddenly my bike got stopped and i found smoke near engine, then i called to nearest yamaha service center, they told me to check the engine oil when i checked there was no dry bolt. i took my bike to davangere yamaha service center they told bolt might haven't tightened so during your ride it has been fell down and same thing i told to yamaha perfect riders service center and they communicated with davanagere service center people. they accepted fault has been done by them(Yamaha Perfect riders service center) and they told they will replace the parts, but for me i want new bike or new engine to be replaced. I have communicated with the owner of the service center . he is telling he cant replace the bike. These guys not taking on their head because they can claim the parts to the company and cant claim the bike. They are putting everything on costumer. Please help me to resolve this.