False adverti*****t and dishonesty

False adverti*****t. Price on the floor not same as the price on til. I went to game stores Lebowakgomo to buy a fan and the price on the floor was R399. 00 to my supprise the cashier said the price is R499. 00 which I payed. Am very dissapointed with this dishonest. I have pictures from the floor and the till slip.