Injured at the Brooklyn shop

I had an incident at food *****s market at Brooklyn Mall. There was a water like substance on the floor which I didn’t see and I tripped and fell. I was with my ***orker who helped me to get up and I tried to look for the staff members but I couldn’t find anyone. So I then went to the cashier and explained to her what happened and she was not even interested to help, by then I was already late and my lunch break was over. I then left the store and my knee was sore but I couldn’t look for the manager as I would get into trouble at work but I tried calling the store numerous time with no answer. I’m not impressed with how the staff I interacted with took lightly to my compliant.