Cyber Monday failure

<p>At about 7h30am on Monday 28 November, I was browsing online on Facebook and saw the promo post of Estèe Lauder advertising their Cyber Monday special. It involved a free gift set on all orders over R1200. At about 9h30am I logged on their website and proceeded to select my items and added the code for the free gift, seeing I qualified. The item was added to my cart and I proceeded to Checkout to pay. Four times I tried entering my card details and it kept jumping back to the Add details page. Finally on my fifth attempt, I received the error message saying the free item is now sold out and removed from my cart. I called their Customer Service number and was then told the criteria is now R1500 and they only had 80 of the gifts available. Is it legal to change the criteria not even halfway through the day, as well as not state that only a limited amount of gifts were available? Their ad stated all day, up to midnight. So while I was struggling to have my card details accepted, they increased the limit hence me not being able to pay the first time, and then the item was just removed. They responded by saying the gift was sold out within an hour after launching at 12h01am. I am very upset with this nonsense because at 9h30 I was still able to select the gift. They are not even offering us an alternative gift or extra samples, yet they happily took my R1280 </p>