Poor service from takealot

We ordered school stationary from them on the 7th of January 2019. Before checking out and confirming the order we made double sure that all items was in stock as we need the items for the new school year. Now, after the payment was made and they confirmed that they received the order, we keep receiving emails that some of the items is out of stock and that the delivery will be delayed. This is not acceptable as the delivery time was stipulated as 5-7 working days. Phoning them is pointless as they can only split the order and sent the items which is 2 of whole list. This is irritating, frustration and will be the cause of 3 kids going to school with no school supplies and school bag due to negligence on takealote side. School is starting on the 15th but delivery is now only estimated to be on the 27th.