Unable to receive a delivery for 5 days

I cannot believe the shockingly inadequate service I have received from Takealot. A delivery that was scheduled for Monday 27 November has not yet been successfully delivered to me. On the 27th the courier called me at 16:22 to say she was there to deliver my order. Unfortunately my office closes at 16:00 so I was not able to receive it. Eager to avoid a repeat I called takealot the following day and was promised my delivery would happen the 29th before 15:00. That came and went with no delivery so I called again. Same promise for the next day. And again on the 30th. I have emailed, called and tweeted takealot but somehow they cannot communicate to the courier company that I cannot accept an order after 16:00 as again today the delivery was attempted after 16:00. It is apparently against company policy to allow direct contact with the courier company and apparently they cannot even contact the couriers themselves so I am at a loss as to how I will ever receive my delivery. Subsequently I have a second order meant to be delivered on 29 November which has also not happened. I have tried to be understanding of the busy time but enough is enough. Their systems are clearly inadequate to handle the current busy season. Unacceptable! One cannot rely on them to receive deliveries timeously especially for gifts. I am completely disappointed.