Shocking Makro Online Service - Refund Debacle

I bought a Taurus Striker Mini (Robot) vacuum cleaner from Makro online for R2500 Inv ***. Within 2 days, I had returned the unit to the store in Nelspruit only to be told that due to it being an online purchase, I needed to keep the unit and it would be collected from me. As I still needed a vacuum cleaner, I went straight into the Nelspruit store and bought another make of machine for R2500. I had by this stage paid R 5000 for vacuum cleaners. A week went past with no sign of the collection. I phoned the online store only to be told that my refund for the R2500 would be processed when the unit was collected. I was then sent an email confirming the return on the 3rd of July, more than a week after I had reported the unit did not work - *******. I have spent the last 2 weeks on the phone with Makro online, speaking to various parties who assure me that the item is due for collection - Ref152285 and Ref152919 to name a few ref numbers. I have still not been contacted by the supplier to collect the unit. I phoned this morning and was told again that the refund would only be done when the supplier collects the item but it is scheduled for today. No one has phoned to get an address or anything. I then phoned Makro Head Office and asked to speak to someone that could solve my problem as my R2500 does not seem forthcoming. I was then told that the collection is booked for tomorrow !!!!! How can the inefficiency of a supplier and a clearly flawed process be my problem. Why does no-one accept responsibility and make an attempt to solve my problem and action a refund in what is clearly a laughable situation ? Is there no-one with a mandate to deal with such issues or take what is clearly a supplier with an apathetic attitude to task as the brand is suffering as a result or their ineptitude. All the while by R2500 seems no closer to getting refunded ...