The car had a visit to the service centre last week. The front suspension was replaced under warranty and spacers were added to the back suspension(to avoid scraping while going over the bumps, especially with people sitting in the rear seat).
After couple of days of city driving, I can definitely say that the thud noise while going through small potholes is gone
In addition, I had told the service personnel that sometimes I was hearing a 'krrr' sound from the rear brakes, on pressing the brake pedal. When I got back the car after the service, I was informed that the "SPRING KIT, REAR BRAKE SHOE HOLD" was also replaced. It seems that this was noticed in few of the cars.
All the changes were done under warranty and I got the bill with "zero" cost.