99 Cents Only Stores complaint: Employee

Orange/ Carson 99 cent store California. I have spoken to manager already. She said she will have a talk with them. On date: nov 17th between 1130 to 12noon. I wanted to purchase a notebook that was show price of 99 cent on display. It ring up to 3.99. Cashier did not honor thy to me for .99 because she said someone put it in the wrong place.
It’s not the customer fault price are put wrong. Move forward.. I told cashier forget it I don’t want it, I’m holding up the line.
I walk away cashier kept talking about me when I turn around and ask did you say something about me? I told her I walk away you shouldn’t talk about customers like that?
I ask to see the manager they lie and told me manger are not here that day so I got phone number instead.
I called manager was in the store.

I’m complaining because cashier are rude to talk about customer when customer walk away. This attitude is unacceptable.