Terrible treatment by Vodacom Tygervalley

Bought the wrong phone cover from Vodacom in Tygervalley in a rush. Only when trying to return it, was I informed of their returns policy which dictated that I could only exchange for another item within their franchise. After searching all their shops, I was not able to find what I wanted. An assistant manager named Kurt then agreed to refund me but said that it could only happen on another day, so I had to go back. Then they didn't have cash in the tills yet, so I had to go back again later that day. Then Kurt was not available and another assistant manager told me that they won't refund me after all. The situation was escalated to their management (off-site), but after some weeks I have still had no contact from them nor a solution to the fact that I am sitting with an expensive phone cover that I am not using. Clearly they do not value customers and their customer service is disgusting. Won't buy from them again if I can avoid it.