Bad pricing

To whom this may concern. I'm appalled by Mr price. Almost everytime I have gone to purchase something from a store, when I get to the till the price changes and it's always more that I have to pay. I had an incedent at the pavilion branch now where I picked up an item priced at R49. 99 and got to the till and the item was scanned and the item was R150. I called for a manager but stood there waiting for one, no one came.The other day at the Musgrave branch basically the same thing happened. I hope that this matter is addressed accordingly because it is terribly unfair.