Royal Enfield — Manufacture deficit

Address:

Chennai, Tamil Nadu

I bought a thunderbird 500 cc like 5 months ago. The day I bought I went back to the showroom in 3 minutes that the bikes break system is not working properly. They said it will b ok if it runs some kilo meters. It been 5 months I went to the showroom for 4 times with the same complaint the problem wasn't fixed yet. What should I do ? I almost went hit some one for more than three time because of the inefficient breaking system