Customer service not acceptable

I was returning one of the items that i had bought cash. Queued in to some rude cashier who kept on yelling at customers that if you are paying your account we are off line. My turn came and i greeted her and advised her that i want to return and would like to get my money back. She asked were is my cash card and i advised her i left my wallet in the car, she said without it, she won't assist. Heavily pregnant as i am, went out to my car to fetch the cash card, i read the rules at the back of the slip and there is no such. When i returned, i queued again, and eventually got there and i asked her were is this rule and what happens if its lost. She just giggled. I asked for a complaints/customer care, she called some Mapula lady who said they don't have such. She then said she can't give me cash, they only give gift cards, i told her, i paid cash and demand my money. She further called the manager(sophie), whom came dd not even greet me as she was on her cellphone. She authorised and left. Why are customers being treated like items and being mislead. The service is ridiculous, how many clients are treated like this and can't raise their voice.