Site misleading

Hi We placed an order 19/09/17 for the Superga 2750 Cotu,it stated that the price is R489 on the site. Since Im a new customer I received R250 off as a voucher ,once the order went through it stated I was going to pay R 489 inc the voucher however that was not my calculations it should've been R239 inc the voucher . Order had to be cancelled due to false advertising on your site, this was suppose to be a gift for a friend , I'm not too happy about this is there any kind of compensation that can be made to make up for your inconvenience as I also informed my friend about this sale.