Most horrible online shopping experience

The worst online shopping experience we've had.. Purchased a whole bunch of grocery and stationary items on the 29th of October. The order was split into 3 as the items were from different suppliers. The first delivery was done on the 30th of October and the courier WUMDrop only delivered the 5 boxes of Milk and the rest has still not been delivered to us to this day. We've been calling their customer care line since the 31st of October to bring the matter to their attention but they keep saying the same thing, "the matter has been escalated and we will get back to you" "we will call the courier and find out what happened on that day" the items show it has been delivered so we cannot refund you" We sent through video footage from the day of delivery as proof of what was delivered but they are still giving us the run around.. Makro is a ****!!!! Poor customer service!!!