False advertising

I received an email from NWJ on Friday stating: "18ct Rose Gold & Diamond Band also Less 50% Now R3077.Shop them today in-store or online" but its not listed on the website. I checked the entire day after the mail was received and again on the weekend but I don't see it listed anywhere. I then went to the store and they had no idea what the email was about and said it will never be that price for 18ct. How do you send out emails with the intention of customers purchasing but dont update your staff and systems accordingly. This is very poor service. The promotional email came from you. We expect to buy at the price YOU indicated. Please sort this out