Incredibly frustrating service!

I ordered 3 items from their online shop last night, i don't get told they have no stock until after i've submitted my payment, when i call them today for a refund i'm told i have to wait up to 14 days! what nonsense is this! why wasn't i notified they had no stock when i first clicked on the items? also why must i be deprived of these items for 14 days when i can easily go to the takealot site and have them delivered in a couple of days! this is not incredible service, i am beside myself!!!!