wrong price display on the shelf

On the 15 may 2015 I went to do my shopping at shoprite checker in tembisa plaza .I bought few items and when I arrive at the till one item was scanning different to the price I saw on the shelf .the lady at the till point call the manager .she call another lady to check it on the shelf .she came back with different price which was totally different to the one I saw .manager went back to the shelf the price were all be removed by staff member ,so I end up pay the price from the till which I was not happy about it because the price you see is the price you pay .