Left my car being washed at a car wash and when i came back 2 hours later, the wiper was off the wiper blade and the blade was on my windscreen with multiple cracks. They have initially denied reaponsibility citing the disclaimer on their wall which says they are not responsible for loss/damage. After viewing their cctv again, they have called me and "apologised" and said they will claim from their insurance. I know i am going to be sent pillar to post, any advice ?