manager assaults me

I went in the garage at 20:20pm. Stopped and aske the attendant to please fill pressure in my tyres. He just said no pressure. So while waiting for a colleague who went into the shop. I saw another car pull up and he uses the pressure. I jump out my car and ask the attendant \howcome that guy is using the pressure. He just shakes his shoulders. I ask him to call his manager. The manager comes and I ask him why is this happening. The manger says there Is water in the pressure. So I sqeezed the pressure to my face and there was no water coming out. I told the manager there is no water. He kept quiet. I finished filling my tyres and asked the manager to give me his name. He refused. I asked again but still nothing. I took a photo of him. He left the petrol pump and ran to me asking why I took his photo. I advised him I asked for his name and he refused. Then I was about to leave. As I took I heard a bang noise. I looked back and saw the manager running towards the car. He hit the car. I stopped and got out. He ran back. I wnt for him. As I approached him asking him y he hit my car. He started assaulting me and was helped by the other attendants. This is not customer service. "