False and misleading adverti*****t by Flight Centre

On the 18th of April 2018 Flight Centre sent out an email for a special where you get 50% off on domestic flights. I tried to book my flights from JHB to CPT and again from CPT to JHB at R450 per flight as stated. The system did not want to let me book, so I sent an email to flight Centre Support for assistance with this, as the sale was only valid for one day. Only the next day (19th April 2018) did I receive a reply saying that the special was for August and September 2018 but no where on their email did they state that!