Wrong pricing and deny

Yesterday I went to shoprite in Milnerton bought stuff but I always make sure that I check my prices so I took bobtail dog food that showed 129.00 got at the checkout point here it scanned 149 rand so I said to the cashier that price is different from the one I saw so she asked her colleague to go ND look she took long and came back saying there's only price for 149 so I went with her came there here the price is gone went back I told them I'm not stupid I know what I saw the one cashier told the other one that I'm laying in they language meanwhile I overheard them ND confronted her she said no she said she only saw that 149 price which is **** I heard what this Xhosa lady was saying I just feel like they should ****en change their shelf talkers ND stop arguing with the customer! I'll never shop at shoprite milnerton again with staff that's unhelpful on the floor no thank you.