One side of the rear triangle must have been bent upwards to cause the brake bridge to wheel misalignment. sight down the tubes from the dropouts and see if you can see a bend or curve at the bottom of one of the chainstays. You can also do a string test and compare the distance from the dropouts and the seat lug centerline or head tube. If you are willing to, you might try to do your own cold setting if you can pinpoint exactly where the bends are and where you might want to apply some force to get it back to alignment....at your own risk, of course.

Chombi