BOGUS DELIVERY FEE

Purchased a dvd for my daughter today, for 'free delivery' you must spend R450 or more and even then it's not prioritised, so I checked if the items I wanted were available. It stated 'in stock' & delivery stated Saturday 16 May if I pay R100 for speedy delivery. I paid for the purchase and was then informed that it would be delivered on Tuesday 19 May- after taking R100 for faster delivery. I emailed immediately to request cancelation and was told its 'too far into processing to cancel' (makes no sense cos I literally just paid) & to wait until it arrives then cancel. I rep**** its not acceptable & dont know what kinda **** they're running by essentially OVERCHARGING on delivery that wont be arriving soon. Do they now expect me to wait & hope I'll just accept it? If I wanted to wait, I could have opted for 'standard delivery', but I DIDNT. I want my money back, including the BOGUS DELIVERY FEE!! I know times are tough but dont LIE to customers and try to make a quick buck off them, we are ALL struggling right now, not just your business. BE FAIR. Totally disgusted. You lost a customer.