But I pulled my swaybars years ago and I bet you won't notice a difference unless your springs are worn out as well as your shocks. I run OME heavies with an extra leaf and run heavy all the time. My rig is my ride to work and there is no noticeable body roll on the highway and swaybars just get in the way off road.
raise hell they should have replaced it. they probally dont have the part in stock and will have to order it but they should have told you. you could probally get a free oil change or something on top of it.