Rear Suspension Springs problems of the 2006 Chevrolet Trailblazer

This vehicle was in a rear to rear accident on 06/04/13. Every since the accident the rear has been down and it was taken to serra Chevrolet in bartlett, TN on 09/16/13. They determine that the rear air springs was not airing up was not caused by the accident. The vehicle was returned to me on 09/19/13 by the collision repair shop. On 09/19/13 the vehicle was taken back to serra Chevrolet in bartlett, TN and droped off for the early bird. That Friday 09/20/13, I was advised that the vehicle rear compressor needed to be replaced as no psi was engaging in the rear air springs. I advised them okay and to go ahead and complete the job. They advised me that my vehicle would be ready that afternoon. Call received at 3:42 pm on 09/20/13 advising that my vehicle would not be ready on 09/20/13, but would be ready by Monday 09/23/13 around 11:00 am. I advised him (david lane) that I was without transportation and that I had toddler that was sick and needed transportation. He stated he did not have any vehicles that he could loan me. On Monday 09/23/13, since I had not received a call at (11:00 am the promise time) I called at 12:30 pm, to check on the vehicle. At that time, I was advised that my vehicle was ready and that I could come and pick it up. I arrive to pick up the vehicle on 09/23/13 at 1:48 pm and paid $885. 39. I left and took possession of my vehicle. On 09/24/13, when leaving work I noticed that my rear end was down again and I immediately called serra Chevrolet and left message for david lane. He returned my call on 09/25/13 and asked that I bring the vehicle in on 09/26/13 by 8;00 am. I returned the vehicle on 09/26/13 at the time asked. An hourin half later I was advised that the aire shocks had pin holes in them and that they really needed to be replaced. He stated that this would be $551. 00 in addition. I aksed if the.