Hyundai Motor India — elite i20 petrol worst pick-up

Address:

600053

I had purchased hyundai ellite i20 sportz (Petrol) at sps hyundai private limited, thiruvallur, tamilnadu in august-2016 with lot of hope as i used hyundai santro xing earlier, but to my surprise the initial pickup of the new car was very worst that the car struggles to move and climb a ramp (Worst than a bullock-kart). I had complained about the issue and got checked 2 - times at sps hyundai and 1-time at kun hyundai - ambattur. But my issue was not sorted-out. The service person tried to comprise me telling that all sensor type cars are of the same issue and i will be used to that over a period of time.
As per my findings i suspect the ecm has to be tuned as it doesnt allow me to accelerate as per my requirement (As it checks other parameters like exhaust o2, speed etc.
My car vin no : malbm51blgm289745
Mobile no : [protected]