TWO ORDERS CANCELLED THIS MONTH

I ordered e-cigarette liquid, paid for it and after a week was advised that the item is out of stock. I was credited and ordered another strength of liquid. After a further week of waiting I have just been informed that the item is out of stock. Why do they advertise products on their website that they cannot source??? I've been a customer of Takealot for years, but this is the last straw!!!