Very Bad Customer Service

I will not set foot there again. Customer service is zero with no acknowledgement when they do wrong. I bought two books for my postgraduate studies at Book Express not too long ago. The lady (Indian lady) who helped on that day gave me one book correct and the other was incorrect. The receipt had the correct titles on it. I checked and she reassured me that they were correct before leaving the store. When I rechecked at home, I noticed that one book does not correspond with the assigned prescribed book. Upon realising, I called the store yesterday (10/05/2022) to alert her that she gave me a wrong book but the receipt has the correct name. Mind you me, the book is still new. She tells me that she cannot exchange it and that there is nothing she could do. She further says that she does not think that she could make such a mistake. As a matter of fact, she does make mistakes, when I called her, she asked me if I was the lady who called her earlier about having bought a wrong book from her? It was my first time calling about the purchased wrong book. So, that means she yet gain sold a wrong book to another person. Then she has the audacity to say that there is no mistake on her side--she cannot help me at all. I have the receipt as proof and the wrong book has their barcode, but she refused to help me. This means that I wasted R565.00 on a book that is not part of my studies. Knowledge is knowledge, but who has money to be wasting on wrong books??? Her unmindfulness is costly. I've learnt a lesson. No more will I go to Book Express. Done, finito! I'm highly saddened and furious by the whole experience.