A fight after I scratched someone's car with no police report
I was backing out of a parking lot when I accidentally scratched another parked car. I didn't notice but I heard someone yelling "you hit my damn car, you hit my damn car!" so I stop. I wasn't even completely backed out of my spot. My passengers got out of the car to tell the lady that I wasn't going anywhere as I was looking for my insurance to prove to her that I wasn't going anywhere. Then the lady punched my friend in the back of the head and more people started hitting her. Someone sprayed mace to get them off her. The police arrived to break up the fight. I explained to them what happened with my eyes closed(bcuz I had mace in them). I still had my insurance close by so I felt my way around I gave it to the officer along with my license. The officer then told me to leave since he didn't see any damages and there was no police report. So I left because people where still trying to punch us. I just got a letter from my insurance saying there was a claim and I need to respond back in 10days. This whole ordeal happened a month ago tomorrow. What do I need to do?