Lying to there client's

I have been trying to order one item from Wednesday 21/11/2018 I placed 3 orders ( ********** 6, ********** 0 and ********** 4), I was trying to use all my eBucks so i ordered 3 items but the eBucks payment method was not working, I also logged a call Ref: ********** 896. So i decided to pay cash as the order was placed and not use my eBucks. Now they tell me they don't have stock off the item i wanted but on Takealot's site it shows they do. But I asked for my money back for the whole order. Now i'm told we are unable to cancel and refund the rest of your order currently as it has been put through the delivery preparation process on our system. Why was i not given a call asking me if I still want the other items or just to sorry. And why when I pay for the order it go's off my account the sometime but now i must wait 5 - 7 business days.