Shocking service from Suzuki

3 weeks and still nothing. Take a car for a service. When it comes back the windscreen is damaged. Service manager says they cant be responsible for stones shooting up from vehicle in front of them. Then said they would look at helping with the excess but i must claim from my insurance. Dealer principal not interested. Sent my request on to "head office" 3 weeks now. Still nothing. The social media team on Facebook was more helpful than anything else. So there is that small positive. But they directing me to the branch where i am getting no joy. Surely it is the dealership that should sort it out and not me. My insurance gets more expensive as i need to claim for something that was not my fault and happened while my car was booked in for an oil change service. Not impressed at all.