[svandamme]

I would argue that any claim is void, even if there WAS damage, once they let that much time go by.
I cannot see any of it stand up in court as they did not communicate within a reasonable amount of time, eg next day. And as such allow reasonable doubt of who did it. It's their business to do things promptly. burden of proof is on them and the proof evaporates as time goes by because the vehicle is in heavy rotation.
The bigger the damage the sooner they should bring it up
the lower the damage the more trivial of nature it becomes