Nexa — Vibration, mileage and Bad Shocks

I have Baleno Alpha Diesel. There are 3 problems.
First is as most of the people said, it has very bad rear shocks. The person who is sitting in rear feels very uncomfortable and even get vomit due to its suspension issues. My 10 year old Indica is far better than this.

Second is mileage which stated as 27 kmpl but getting only 15 kmpl . Maruti should stick to their statements so they don't loose their valuable customers.

Third is car vibration at 120 speed/hr. We cannot even hold the steering at this speed. It will be like sitting on the Tractor. Again my 10 year old Indica does not have this issue at all. We will be travelling on Highway often and this is very disgusting.

When you say premium car and spent nearly 10.5 Lakh, this is not the level of expectation from Maruti. Please correct all these issues ASAP.
The service center people are saying that there is no problem in the car??