Poor delivery policy

I placed an order for necessities, such as baby formula. I have received a 3rd notification to tell me that the order is being delayed. They stipulate to my area delivery is 2-3 days. I will receive it over a month after placing the order. I sent a mail - no response. I called the call centre and asked for the order to be part delivered. I was told no and told I could cancel the order and replace it as the only solution. When paying there was no notification of the delay. 6 children will now not get their calculators in time for their matric exams, printer ink now needs to now be bought at a store as it will not arrive in time. The baby formula is 0-6m. It was being purchased for a 5 month old. By the time it arrives the child needs to move onto a different formula. Incredibly poor.