Frustrating Experience: No Refund After Canceled Order

I placed an online order with Makro on 26/03/2025, but about five minutes later, I realised I had mistakenly used an address from a different province. I immediately canceled the order and reordered the same items to the correct address. The following day, I received an email with an update. However, upon closer inspection, I noticed that they had split the order into two parts (1.1 and 1.2), and I had only canceled 1.1. I contacted them by phone, and they informed me that since the order was already with the courier, I should simply refuse delivery when it arrived. On 01/04/2025, when the courier came, I followed their advice and refused the delivery. However, later that same day, at approximately 17:16, I received an email stating that my Makro order had been successfully delivered. At 17:22, I sent them an email to query this and followed up with another email on 08/04/2025. To date, I have not received any response from them, and they have still not refunded me. To their credit, I have been an online customer since 2021, and this is the first time I have experienced issues with them—aside from the recurring nuisance of being able to place an order only to be informed later that the item is out of stock.