Prices inconsistent

<p>In many occasions the pricess marked on the racks differs from that at the paypoint. If you are sharp enough to detect that the price at the paypoint is higher, you are requested to go to another counter and apply for a credit. This has happen to me as well as various other people which I know. This is unfair, as it takes up my time and secondly I don't want a credit but rather my money back. </p>