Rear Suspension Coil Springs problems of the 2012 Hyundai Elantra

Driving in a 35 mph zone when I drove over a small pothole. The car made a long bang noise, car began to sway side to side uncontrollably. I learned that my coil springs were severely damaged and had bended my rims of the wheels inwards, and thus my rear wheels became deflated. Had to change the coil springs and rims, but I noticed that 3-4 months later, the coil springs and shocks are deteriorating once again and continue to have the loud bang noises and car drops heavily after going over speed bumps. Also, car is hard to keep steady in areas where there is wind even in the mildest forms, which is scary when there is high winds during my commute in the fall and winter. Car will be swaying side to side even when driving way below the speed limit (say 30 in a 50 mph zone, or 40 on freeway).

While driving on the highway at 65 mph the car went over a small bump and driver felt an odd vibrating feel from the car. There was a huge amount of white smoke visible in rear view mirror behind the car. Driver pulled over and found the driver side strut coil spring had burst thru the strut mount and was rubbing against the tire sidewall of the tire. Driver replaced the tire with the dough nut spare tire, which was small enough to avoid the extended spring, and carefully drove home. Driver replaced the strut himself as car had 170k miles and out of warrenty.