Going around in circles with Takealot when the mistake is on their side

Takealot delivered my order on 12 September, but one item was missing. I immediately reported it to Takealot. Since then I've had numerous agents informing me that the branch will deliver the outstanding item, but to date still no delivery. I have asked for the matter to be escalated, but the standard response is that they will contact the branch to deliver the item. I have also been informed that they have found that the packing error was on their side... and of course, they will escalate the matter to the relevant department.

13 Days later and I am yet to receive a refund, credit or my item. Just another message from an agent informing me that the matter has been escalated to the relevant department!