So the luggage could have been lost on the US domestic segment as well?
BTW, you sound like a rookie, despite claiming to fly a good deal of miles every year.
Not a big deal after all, you will be reimbursed for your clothes and the damaged luggage according to the conditions established originally at the Montreal Convention, on top of that they will throw in some miles or a TCV and that's about it.
At least, I hope you found a rather expensive clothes store in Hanover.
If they make you wait, you force them to pay a decent amount of money.