Pathetic Online Purchase!!

On the 30th of April 2020, I placed an online order for items being, Pampers Premium Care size 5 jumbo box, Pampers Premium Care size 4 jumbo box & 3 2litres of cokes. Delivery had arrived to me on the 9th of May 2020 around 12:30pm, when I got into the house I checked my items cause it was a huge box & the driver didnt wait for me to even open it, I noticed that from the 5 items, 2 items were missing, 1 being the Pampers Premium Care size 4 & 1 2litre coke. I tried calling the customer care however they closed at 12pm!! I then called this morning waited for an entire 20 minutes before an agent could pick up only to be told that the items as been dispatched & not sure when delivery would take place. I had asked her for a refund for those 2 items simply because it's an essential product which is required for my 1 year old & she responds that I should wait for delivery which could take 5-7 working days. We facing a pandemic where funds are tight & she expects me to have more money to go & purchase another box which now costs R459 whereas online it was R359. I told her I need the refund asap, she said that she would try to see where the guys are to speed up delivery but I cant wait simply because it's an essential item which is now needed for my son!! Absolutely pathetic service received from them & this isnt the first time they mixed up an order.