Beware of Online Purchases

I purchased a fridge online and as soon as it arrived, I realised that I'd purchased the wrong one. I immediately logged a return request and Makro even sent an email acknowledging it, but now there is apparently nothing on the system and no one is coming to collect the fridge. Online orders can also only be returned online, so I'm stuck. They seem to want to make it as difficult as possible for you to return an item, in a bid to not have to refund customers.