Pathetic service from Woolworths online

I ordered some products from Woolworths homeware range on Wednesday, 21 November 2018 and I was sent an email that the products will be delivered on Saturday 24 November 2018 between 10am - 1pm and come 1pm on Saturday my products are not delivered. I called Woolworths and I was informed that it will be delivered on Monday, now the question is why was I not informed of this delay, btw. Woolworths already banked my payment from my credit card. This is the kind of pathetic and poor service we customers receive from a so called reputable store. Come Monday and I am still not guaranteed that I will receive my products. Why do Woolworths confirm a delivery date which they cannot honor.