Overstated stock levels and unable to fulfil order

<p> I placed an order for one of their daily deals at 7:12am using the mobile app but was unable to make payment by credit card as the app does not function properly. I logged in later and made payment by credit card using my PC and the payment went through fine. I was then contacted later in the day by Takealot stating that they are unable to fulfil my order as their supplier does not have stock. I have since requested an alternative but they have been using a stonewall approach. This is also not the first time this has happened to me with Takealot. My questions to them are, why advertise that you have stock and allow a client to place the order and then come back to them saying you do not have stock? Should you not state correct stock levels to avoid disappointing your customers?</p>