Extremely worst customer service

I went to Liquor city in pimville I greeted the cashier politely twice she ignored me and only responded when I asked her that sister but I'm greeting u but u ignoring me and only scanning the products she then said it's R45 and I just let it slide when I was paying I paid with coins, cashier asked what must she do with these cents I asked her what she means what must she do with these cents coz I'm paying she then gave me bad attitude telling me that I'm delaying other customers. I asked for her name, she didn't have a name tag on I asked for a manager she said there's no manager I asked for someone who's in charge she said there's no one I asked a lady next to her to tell me her name she said she doesn't know I asked for her name she ignored me and asked me to the side I asked her to call the manager she said there's no one I asked her how there's no supervisor or manager she said it's like that. As I was speaking to her she said I must leave coz I'm delaying other customers then she went on with her business counting stock. Ive never felt so small as a paying customer I'm never buying from Liquor City ever