Travelstart false advertisers!!!

I received an email this morning from Travelstart with regards to a promo they are currently running. If you download the Flapp application and you book your flights online you will receive a R200 discount. The promo reads : Ends midnight, 7 May 2019 R200 Off Any Flight Booking! Use voucher: FLAPP200 When can I book: until 7 May 2019 (subject to availability) When can I travel: Travel anytime Competition duration Valid for first 200 bookings made on Flapp.

I then made my booking and used the voucher for the discount and as i checked my confirmation the R200.00 was not discounted. I called Travelstart and spoke to Dylan who advised the promo ran from yesterday until today and they have already reached 200 bookings made on Flapp. I then asked why they false advertising promotions if they no longer available? Why not take it off their website completely ? I booked that certain flight due to the promotion otherwise i wouldn't have !!!!