Makro crown mines inefficient

I bought a Hisense fridge and paid for it 28 April 2019 at Makro Crown mines. The sales person had said the fridge would be delivered the following Thursday 02 May 2019 yet today is the 07th May 2019 and I still haven't received the fridge. I have been following up with the fridge delivery to date and I have sent the respective person an image of my invoice and delivery note copy however nothing can happen until I give them my original copy of which I refuse to hand over as it is the only proof of purchase that I have. Can makro come up with a better solution with regards to the situation that doesn't involve me giving away my only proof of payment and me having to be inconvenienced by going back to the store. Very disappointed.