Shocking service-still waiting for refund since 15th December

I have been waiting for a refund since 15th Dec for R599.99!! I found a dress I looked in the Cavendish store, but they didn't have my size. The cashier recommended I order it from their on-line store. He did the order for me and I paid R599.00. it was due to be delivered in 3 days. after 4 days I had to call 3 times before they told me there was no stock. I have now had to call 6 times to get my refund . Cassidy at the Cavendish store has been helpful but client service at head office have been terrible. promised a refund on 23rd Dec, no apology and no refund today !!!