Yamaha Motor India — Not providing well service against new bike purchase

Address: Nikam Yamaha, Karad

I have purchased new Yamaha Fsz bike from Nikam Yamaha, an authorized showroom in Karad city. They are charging for service in bike new bike purchase but not providing good service.
They were not providing the Yamaha announced cashback offers on Ganapati festival. They are taking extra money from customers and keeping cashback for themselves. I had to argue with them for cashback. They are just delaying the RTO registration procedures without any reason. On asking about delay, they are just ignoring customers or giving random reasons.