Incorrect Pricing

I went to Game on the 29-04-2015 took an tekkie from the shelf (Olympic ) .The price advertised on the shelf was R190.00.When I got to the till ,there has been a problem as the scanner did not pick up the bar code.The Supervisor then came to assist and took th box away to get a pricing .After about 10 mins she was back she informed me that the price is R 230.00 and the price on the shelf was for old stock.I told her that i took the box from the shelf and she just asked if wanted the tekkies.I bought the tekkies but find this very unfair as i have been misled and incovenience as I was late to work as I went during my lunch hour.