Bad suspension system

I have the car of 2016 model..driven 15 kms..car has very bad suspension.. doesn't feel like sitting in a luxury car on bad road.. of course India is a country where u can't expect a good road every where..the cars is ok for good road..bt worst on bad road..I called the nexa customer care they are the worst people ever they don't respond to solve our problem they only talk..it's frustrating and went to service center and told.they said it's manufacturing defect we can't do anything.. should we we pay around 7-8 lakhs for them to purchase defect product..and. They are not responsive for our problem they are only good at selling product and marketing