Wrong pricing all the time

Shoprite naledi mall in Vosloorus always mislead customers with their prices. It is so tiring being up and down to the shop because of their wrong pricing. I bought potatoes which says R29 on the black Friday leaflet and was charged R40 for the potatoes when I queried the guy working in the department said the right price is the one of R40. I really struggle with shopping there because most of the time their pricing I'd just wrong and won't go back to the shop for R10 while will cost me R20 to go there as I left the proof at home.