Advertised prices not being honoured

I saw a dog bed on Takealot's website yesterday. It was part of their payday promo. The price was R249, and the original price were R349. I added this item to my cart, but when I got to the checkout, the price did not reflect the discount. I phoned and a lady promised to look into it and call me back. Later when I checked the item again, all of a sudden it was not on sale anymore. Luckily I took a screenshot of the item with the sale price. Nobody got back to me, and I emailed them, and they rep**** that they escalated the case to the relevant department, but I haven't heard anything. I feel that this is cheating the public, as well as *********, to change the price while I query it!