Help my h2 feels like the body is floating off the chasy
 

This is a nightmare! My mom backed up into my hummer so we took it to the body shop then it wasn't driving right so we took it to pep boys now it is unsafe to drive! Iv taken it 4 places paid for 4 opinions and everyone just scratches their head! It's all over the road when you hit a dip it goes left right can't keep it straight and it feels like the body lifts off the chasy im loosing my mind no one can figure it out I need help!! Ppllleeeaassseee!!!!!

Where did she hit it? Post pictures of the damage and also your suspension components

Does it have the air bag suspension and are they all still inflated or inflating?

Pep Boys is not where to take a vehicle that needs a repair. I would not let them change my oil.