2004 Kia Sorento Help

I was rear-ended 9 weeks ago, took my car to the body shop and they determined that my frame was bent. Between the shop and the insurance adjuster they decided they would "fix" it. It was completely taken apart, and put back together. When they gave it back to me the check engine light was on, I had no power steering and a few other things were wrong, so I took it back. There were 17 codes that came up. They still have my car, and cant seem to get it right. Should I be concered about continuous problems when I finally do get it back, and if so what should I be watching out for?Note that my ck engine light was Not on when I took it to them.