Takealot guaranteed express delivery is a ****

I ordered a projector from them on the morning of the 13th with guaranteed express delivery, meaning the projector would be delivered the next day, the 14th.

The delivery app started the item would be delivered between 8am and 5pm on the 14th, and I waited the whole day. Finally I phoned them at 16:45 requesting to know when my order will be delivered. 1st they did not know where the item was and had to get back to me, they never did. Then the next day the 15th I phoned them again cause I have not received feedback. The person then stated that my item was on route from the warehouse and they would let me know when it arrived at the branch for delivery on the 15th. I informed the person I spoke to that the item was supposed to be delivered on the 14th cause that is when I needed it for a presentation. That is why I booked it guaranteed express delivery. It was not delivered on the date it was booked for, the 14th so I did not need it anymore. He said my item could only be canceled when it arrived at the takealot office for delivery.

My problem is why do they allow you to book an item guaranteed express delivery if they can't deliver it the next day, and why was I not informed beforehand that the item will not be delivered in time beforehand. Why was I the one that had to call them to find out why my item has not been delivered, and why did I have to wait a whole day after delivery date to get answers about the item???

Why do they not inform the client? I had to do my presentation without a projector cause they could not deliver on time and could not inform me in time to get another projector in time.

I ordered the projector from them on the guaranteed express delivery option cause it was a promise from takealot that my item will be delivered the next day, not 2 days later. And this is just one of 3 times takealot has not delivered items on their stated delivery date.