10% discount for Edgars member - No Discount

I have logged a complaint with Guest care and spoke to Nolita, however as explained to her I am not satisfied with the out come. When i tried to book a flight last week. JE364 it was R927.72 and JE337 was R997.72. I then logged in with my Edgars card and tried booking the same flight. JE364 was R914.92 and JE337 was R959.92. It clearly states on the booking with my Edgars card logged in 10% but the amounts above is definitely not 10%. Nolita said that the prices were more and there are different classes, however I have just proved that the exact same flights with it indicating 10% discount, it NOT 10% discount. This is false advertising! You cannot advertise 10% discount on a flight but then say no its not that rate its a different rate that is not being shown. It must be 10% discount from the original price. If I had not checked the difference in rates I would have thought that I am getting my full 10% discount when in actual fact I am Not! How many other customers have you fooled with this? In the mean time i have to keep rebooking as the booking is expires and ive been told i wont get refunded if i book and there is a complaint.