Discovery Travel - Misleading advertising

Discovery travel advertises that you get discounts on local and international flights. In my case I got 20% discount. I made a booking for 2 people. I do agree the discount is only for me as a Vitality member. On the day I made the booking the price of the tickets were exactly the same on the airlines website and on Vitaly Travel site R4831 per ticket.So if I bought the tickets on the airlines website the total price would be R4831 x 2 = R9662. When I bought the tickets on the Vitality Travel website the total price was (R4831-R772 discount) + R4831 for full price ticket. Plus a booking fee of R920. Total cost R9810, R148 more than if I bought the tickets directly from the airline. So the advertising that you get 20 % discount is false advertising. In affect I paid R148 more for the tickets because of the booking Fee of R920. So there were no discount on the transaction.