Dishonest advertising

I ordered a 1 month supply of Pure Garcinia tablets over the Internet for an advertised price of R 299.00. When I confirmed the order, the price changed to R 498.00 I called the customer care number in Durban and Lois was totally uncooperative and refused to cancel the order at the higher price. She could not explain why the price was different to the advertised price on the website. The price of R 299.00 was clearly quoted as valid until 17 March. This is clearly a dishonest supplier intent on cheating its customers. I also realized that there was no company name displayed on the website, so I can only quote the product name. I tried to cancel the payment immediately after getting no satisfaction from Lois, but found that they had put through the charge to my credit card immediately. This is a devious supplier!