Passenger car window broken by roadside cleaning crew-who to contact ?

While traveling from SDQ airport to Las Terrenas I had one of the car windows broken by roadside cleaning crew. They were mowing the lawn and my luck would have it .. the machine hit a rock which flew in the air just as we were driving by breaking one of the rear windows.  No supervisor on site or way to log/report a claim, no cop any where, not even the roadside assistance vihicle around. We were given a number to call which turn out to be a non-working number. Needles to say we made it home with a rag on the window. Luckily it didn't rain on us. 

Does any know who we can contact to submit a claim and recover some of the RD&3,000 this is costing me ?

Any lead would be greatly appreciated. Thanks !

Thank you for the sound advice. You are 100% correct. What was I thinking ... time and energy spend fighting for $60 bucks.  Case closed.