Rear Suspension problems of the 2008 Kia Motor Rondo

I own a 2008 kia Rondo and found out there is no way to align the rear tires and my back end is so bad that the tires are tipping. I have contacted kia several times and have been told the engineers are working on a fix but it has been over two months. My tires are so worn out from the misalignment that the car sounds like a tank going down the street and when it rains it is hard to control the car. Kia has offered to replace the tires but unless the underlining problem is fixed in a few months I will be back to square one. The car is unsafe to drive in its present condition but kia has done nothing to resolve the issue. Please help and have this car recalled and have kia be held responsible for the manufacturing defective.