dealership not taking responsibility for damage to car

I took my car in for a service and when I fetched the car the windscreen was cracked. I reported to the workshop guy who was assisting me and he said the manager was not around and she was the only one with access/authority to check the cameras. I have been calling and emailing for two weeks and getting ignored. I went to the dealership and found the manager and she said they don't take responsibility for any damages to the windscreen. Apparently even if someone damages your windscreen, it it obviously by accident and not on purpose. They told me too bad they can't do nothing for me. She didn't even bother to check the cameras. I am waiting for the footage to be sent to me so I can know exactly what happened to my windscreen. Someone has to take accountability because who must fix this. The attitude on that woman is disgusting how nonchalant she is for a person in her position. Very irresponsible behavior for such a big and well known organization. I am beyond ****ed. It is one thing if I damage it, but for a whole dealership to do this and deny accountability. They have left a bad taste in my mouth.