Mahindra Two Wheelers — Complaint regarding the service of my motorcycle rockstar

Address:

Nagpur, Maharashtra, 440011

Dear sir,
I had purchased a new mahindra rockstar bike on 22nd june 2016. Mh-31, ew 5891. Sir, i am disappointed to say that the bike is not working smoothly, as vibration is there, and knocking sound comes from handle. For this i had complained to mecury motors, nagpur, from where this vehicle was purchased.
After repairs and servicing, it functions smoothly, but again after almost 10 days the same problem creeps up again, which is very disturbing. 2 times i have given the vehicle to mercury motors for the same complaint., but the fault still exists.. The mechanics who has done the job is not up to the mark. Instead if tightening the nut bolts, he uses chisels to tighten it and virtually damages the nuts. This can't be accepted from a highly reputed company as yours.
Now, another complaint, which has araised recently is that while slowing, in traffic, it automatically stops, and after about half an hour it starts.. Sir, kindly look into the matter as very urgent, and do the needful.
Regards.
Sudhir choudhary