Treated like *********

My husband and I went to bargain books in Greenstone mall to get our son some reading books as well as maths books. We go the the till and the total amount was R 610. We paid cash and the lady at the till wanted to check the money first with the machine. After numerous attempts, she asked another lady for assistance and she tried as well. She asked us to bring back the bag with the books and thats when I started to get furious because it felt like we were *********. They checked the machine again only to find that the plug was not switched on. They switched it on, checked the money and found that it was real. I asked for my money back as they had already taken the books from us and we left the store. I will never again buy from that store and my sister who lives in Greenstone was a regular customer and she will never buy there again.