Santro suspensions, can it improve?

Hi, I own this Santro since past 2 years. It is a great performer and one can surely enjoy the drive as engine performance is great and steering response is also cute.

Most irritating problem for me is the suspensions, especially when car is not loaded. While front suspension are somewhat ok, rear suspension are really bad. In total, suspensions are bad and I could feel almost all smaller and bigger bumps from the road. This is VERY BAD and not expected after shelling out so much money on this car. I could even say that Alto suspensions are way better than this car.

I want to know is there any way to improve suspention performance of this car, by altering any settings (though not compromising with safety).

Driving ease, style,VERY BAD suspensions, not a great mileage, discomfort to driver ankle