Unhelpful service after their delay

Placed an order in which all items were in stock according to website, for delivery 21 Nov. Now get a message saying order delayed. Because of this I need to change delivery address, as this was a gift being brought to Durban. I have now been told it is not possible to change adress after payment? It's not my fault that Takealot.com can't keep to their delivery date? Very Unimpressed.