incorrect amount

Mr Price Fourways sold me leggings that didn't have a tag and was worth R50 on the System with R159 because all the their leather leggings are worth R159

apparently they didnt have stock but the one pair of leggings was there and they made me wait for 45 minutes checking for the leggings and there was only two types of leggings the one I wanted to buy which was R50 and the other which was R159, they refused to sell me with the price on the system and they said it will be stock loss

they promised to call me back regarding my issue and they didnt