Front Seat Head Restraint problems of the 2006 Chevrolet Cobalt

My wife an I were stoped at middlebrook pike trafic light waiting for the oncoming traffic to pass on western avenue in knoxville,tennessee so that we could make a right turn. We were rear ended by another vehicle who failed to stop. My seat belt did not restrain me ,I was bouncing back and forth several times(I remember going back and forth around 3 to 4 times before it knocked me out). The seat belt just did not hold me ! at that time I weighed about 250 to 260lbs. I was paralized from the waist down for about 9 days at the university of tennessee hospital in knoxville on the neuro floor. I have been to patricia neal rehabation several times and they have fitted me for a power wheel chair. If the seatbelt would have worked properly I would not be in this situation the head rest is bent and loose were my head bounced off of it severaltimes, an the seat itself moves when it is supposed to be stationary(it can go forward or backward) without warning. The car dealer said they was a recall on the seat belts on this car but they never did fix them. The car dealer had people who bought vehicles sign papers that they had their pre-delivery inspection when they did not. The dealer would give them a tank of gas for it an also for any letter from gm on ranking the local dealer's service favorably only. This dealer knew of several recalls on this vehicle but they did not want to fix them under the manufactors warranty. My wife called gm headquarters and they told her that if she had any more problems with her car they would replace it . I also have a spinal cord injury.