Royal Enfield — sprocket broken

Address:

New Delhi, Delhi, 110059

I bought a new classic 350 bike from royal enfield in Octoberr 2016. Now it has covered a distance of 7700 km. Today when i was riding the bike, there found some slippage in chains with sound and when checked it was found that 4 teethes of sprocket (rear side) found in broken condition. I bought this bike because of good reviews and for this cost it should give some minimum life to its parts. I think the low cost bikes available in the market will give more life to parts than this. I am completely unsatisfied