Bad customer service

I like to complain about bad service i have got today in frontline hyper vandabjilpark. There price on the shelves dont correspond with the price on the system.

The pampers is R69.95 on the shelves on the system is R139.95 i spoke to manager of the store but him and some of his staff fail to help me.

Frontline hyper dont follow the merchandizing policy and price policy they ***** money from the poor. I have evidence of the prices that are not correspond . can hello peter help me to solve my complain i truly need that money that they over charge me . they refuse to resolve their price issues.