online delivery ****!!!!

Placed an order online on the 12th January on the woolworths website. Got given a choice to select a delivery date, chose 16th January time between 10am and 1pm. Called the online number provided and lady told me that the order is with the delivery company and will not receive the order on the date stipulated.

- Why was I charged an extra R50 for delivery for selecting a specific date and time? - WHY DOES WOOLWORTHS ALLOW FOR CLIENTS TO SELECT A DATE, IF THEY KNOW THE ORDER WON'T BE DELIVERED ON THE DATE SELECTED AND EVEN HAVE THE AUDACITY TO CHARGE THE CLIENTS AND EXTRA COST?? - Why does woolworths not allow for customers to have contact to their STORE house.