Bad customer service

I was at pnp Mams Mall. The service I received from the cashier was horrible. I have been moved from one cashier to another for about four times. I payed for my stuff and asked for cash back, the cashier by the name of Simangaliso Sibiya said he doesn't have the amount I want, I humbly asked him to asked another cashier to assist me with cash back he said he will ask the manager to refer me to another cashier which he did. The cashier I was referred to named Beauty Skhosana. I spoke to her and explained that I was referred by the manager to withdraw by your till she just looked at me and not respond. I waited for her to finish with the customer and I reminded her that don't forget I want to withdraw then she said she can't help me because she has a long queue, i asked why did you leave me standing all this time without telling me that you can't help me. I explained that I was moved from one cashier to another I queue again. She started discriminating me against my religion because I was wearing a badge from another church so she saw it fit to use my church to discriminate me and also said I have problems that's why I am complaining. I want apology from Beauty Skhosana and Pnp Mams mall