I bet they used the jacks to change out the old for new tires. If they were not damaged when you took the coach to get the tires changed, I think I would take them to small claims court. And if they lose the case and they still do not want to pay, just put a lien on the business account. They will pay if they want to do anymore business.
Now as to the jack brackets, IF the leveler is not damaged and the only thing bent is the bracket where it is attached to the frame, all they have to do is get an Oxy/Acetene torch, apply some heat and straighten the brackets. It should not take very long.
Now you mention that a couple of jack pads are missing?? Were they missing when you bought the coach? Anyways it seems to me like you could probably buy them from HWH. Might give them a call.
2002 Gulf Stream Scenic Cruiser
330 HP Caterpillar 3126-E
3000 Allison Transmission
Neway Freightliner chassis
2017 Buick Envision