Rude and bad attitude

I was shopping my kids as I was walking at the store this lady shouting said stop can't you see the floor it's wet and I aske her I we suppose to see that if there's no sign, she said I'm telling you now and there is no sign in a very rude way, I told her thst in the future she must make sure you put the sign and she started shouting everybody in the store wanted to see who was shouting you can imagine, she said sorry but you can see she didn't mean it, one of her stuff friend with dreadlocks she said nana meaning a baby I told her I'm not nana actually they were both attacking me I told them I might look young but I'm not nana, she said at the store that's what they call people. As a regular customer I dont think I will ever go to that store due to the staff that lacks customer service who still need to be trained and deal with their anger, actually they don't deserve to be dealing with customers. As a quality manger I believe there's is sign to be displayed for everyone to see according to the ISO, what happens if I fall due to wet floor, the company will have to pay millions because of that small board. I have never seen unprofessional people in my life.