well, take a look yourself. If its that out-of-whack, you should be able to tell just by looking. If they argue thats not the problem, tell them to lift up the car and point it out to them.
Also, if you don't mind spending an afternoon grunting and cursing on the floor of your garage, swapping out the crossmember isn't terribly hard, just kinda a pain in the ass... Definitely a two-person job too. You can probably get a crossmember from a junkyard for about $50, I'd imagine. Just a thought... if you're not up to it, thats perfectly understandable.