price n barcode's

I went to pick n pay eager to by myself a file. The price on display was R14.99. Sadly at the tills it read R69.99 the cashier supervisor followed me to the items n saw it at R14.99 and still she and the manager refused to give it to me at that price. Apparently if the barcode of of the price on display n item dnt match than they can't give it at display price. I was sad because this means prices on display at pick n pay CNT b trusted and that its my job to ensure that items barcodes are the same as the barcode on display