Misleading discount on online order

<p>CNA sent me an email stating that if I purchase 2 or more selected gaming titles that I would be entitled to a 20% off the the price on selected titles. I did choose 2 of the selected titles and noticed I did not get a discount. i emailed CNA and they told me to proceed with the order and that I must give them the order number so that I can be credited with the 20% in my account. I placed the order and gave CNA my order number so that they could query about the discount. I get a phone call and then they tell me that the price that was shown online was already the discounted price. So I asked them to cancel the order as I was mislead and the guy tells me that the order is with courier company and that if I dont want the item that I must either send it back with the courier company unsigned or bring it to any CNA store. The email that I got did not state that the price was already discounted</p>