sounds like the cars made from a soft as hell metal as i have never but a sub frame or hub on my is.
only time that happened was hitting a armaco wall at 50 mph in the race car im now running and even that wasnt a big twist
i would get a second opinion from the dealer as if a place say that and dont have the stuff to srighten normally people wouldnt all they have to do is keep the car for a couple of days and then tell u its done charge a fortune, for doing nothing.
already had it done, and the same place did it to a mate.