Wrong Pricing & Bad Attitude

I bought a pack of Bananas at Pick 'n Pay store in Sidwell, Port Elizabeth yesterday. The price in the shelve was R14.99 and there were 2 shelves above each other with the same bananas. When I got to the till after standing a while in que the bananas price was R25.99, I informed the cashier about this & she called Fernando who was the packer in Fruit & veg ans he said they are R25.99. I went to him to show him the price and he said it's not the right price and it's customers that changes the prices all the time. I asked him to call his manager and check the cameras because I didn't change their prices & I had no reason to. I also asked him if the customer's changed the prices where was the price of the bottom bananas. He said "it's okay sisi you can go to the cashier you will pay R14.99". When I arrived at the till point the manager came & said he wants to hear from Fernando. I walked with the manager to Fernando & Fernando had already placed a price under the bottom shelve of R25.99 & he said it was customer's that moved the bananas to the top shelve - the manager agreed with him saying I was suppose to check if the bar code corresponds with the item as this was not their error. I left the store very upset because they made me look like a **** - of which I always buy my fruit & groceries at Pick n Pay Summerstrand, Moffert Retail Park & Baywest and in all these stores I never experience such bad attitude from the manager & the staff. I am very disappointed with this particular Pick'n pay & I felt offended big time. I hope the Pick 'n Pay management can resolve this because it was not first time I encounter such service in this store as a result I don't visit them regularly. Does this mean when buying groceries at Pick 'n Pay we must study bar-codes as well??