Returns and exchanges

I ordered 2 products and returned them for an exchange as the one was damaged and the other product didn't work (manufacturing fault) Mr Delivery which delivers the products collected both my return items on the 4th of November. By the 5th of November they sent another driver to exchange my first product however, they never noted that the product was already returned and he was just supposed to give me the exchange... so I did not receive my product after phoning and Mr delivery confirming receipt of both products...(Do note I did phone them on Monday to make sure I could hand both my items to the driver collecting)... on Thursday the 6th of November they came yet again with the exchange also not noted that it was already returned the driver yet again had to phone the office (after I phoned them twice that day to make sure it doesn't inconvenience me again) I had to wait another 20 min and finally I received my 1st exchange (still awaiting the other one) so today on the 12th of November I get another delivery which is a fault on their side as they delivered the same return as the one last week... so I tried calling them and they do not answer (before 5pm)... now for the 4th of 5th time I have to waste 20min of my time at work just in the hope of them maybe returning my 2nd item and me giving them back a duplicate order... first time I've had such an inconvenience and I am highly disappointed... what is going on with takealot?