Horrible communication amongst employees of takealot

I've used takealot so many times and never had issues with purchases or returns.

I received a delivery last week, but 2 items were missing so I logged a return and put in the notes that the 2 items were missing. When I then realized the correct missing items process, I canceled the returns and booked for missing items delivery. It is now the 2nd day in the row that a delivery person is coming to my address to "collect" items, they refuse to deliver the missing items until I give them the items I am exchanging them for, the problem with that is there's no item to exchange cause those items were completely missing from the delivery. I emailed takealot this morning to say 1 delivery failed yesterday and I am had received a new sms this morning saying a collection is scheduled for today. I got a response saying that sms means they are going to deliver the missing items, yet again the delivery person refused to hand over the missing items until the "collection" is done! THERE IS NOTHING TO COLLECT! It is very obvious that there is no clear communication between the employees of takealot or someone is just not competent enough to figure things out