Same thing happened to my dads truck. When they shiped it, the shock got dinged and it wouldn't go up and down right. You may want to check the shock to make sure it's ok. Look for the obvious stuff too like the bushings as mentioned above!!

If you are not happy with the way they fixed it, take it back and make them fix it correctly. That is their job. If they won't, threaten legal action. Did your insurance company pay for the repairs? Call them and tell them the problems you are having with the shop. They have more time and money to go after these people.