Mahindra Two Wheelers — Regarding my centuro nxt

Address:

New Delhi, Delhi, 110018

I bought the Mahindra Centuro NXT in mid-december. I bought it from JMD two wheelers (S1/1 Old Mahavir Nagar, New Delhi 18 ). after 10-20 days it started giving me major problems. the first was that the bike had vibrations when it came to the speed of 70 kmph. the second was that the nuts of key slot portion came out and it was broken. third was the worst, while riding, the silencer of the bike came down and can lead to an accident. fourth its engine oil was leaking.fifth suddenly while riding its engine sound changed like that of a ball bearing. these all problems were resolved one by one by JMD two wheelers. but why i have to go to the service station again and again and wait for 4-5 days for its repair. seriously this bike is giving me very problems and i want an exchange for it. plz help me against this matter.