Nedbank Travelstart Flight **** - Beware

Nedbank offers, through Travelstart, a 20% discount when booking flights, I used the correct url as per Nedbanks website as a Greenbacks member. Searching for the tickets it states that the discount has already been app**** (before even entering my card information) however when I go to the normal travelstart website, the exact same price appears. What’s worse, the Airliner has the same exact flight for even less.