Damage of vehicle

I took my car fir a valet and buff at sparkling in gateway centurion and when i collected my car the windscreen was cracked and the *** who help me blaned it on my and said it was like that when i drioed the car in the morning but it wasnt. The owner said i am more then welcome to view the clip of fhe camaras of that day. I know my windscrean was in perfect condition when i left the car there so now im spending my day tomorrow watching fhe clips.