Datsun — Starting problem on my Datsun redi go sport

Address:

560100

I have bought new Datsun Redi go sport vehicle by last month only and it was run 900 KMs .now it’s getting starting problem.
Today (13th dec’16) I have given my vehicle to service center (Surya Nissan – Bangalore) and they are telling me to pay more than Rs.7000 for resolving the starting problem issue.
When I bought the vehicle, they said first 6 months there is now problem with rat and all and it will not get any issue for that. Now they are telling me the issue happened because of rat only and have to pay for that.
It’s really strange for me now and worried why should I choosed Datsun.
Request you to rectify my vehicle problem without having any charges.
Vehicle No : KA 01 MP 1775
Service center: Surya Nissan – Bangalore
Awaiting for valuable response….