Prices displayed on shelves are almost always wrong

Today I went to this place as I have done numerous times. I went to purchase a gift for my nephew and for some odds and ends. I picked out a toy with a price under it stating it was R119. I thought it was cheap so I double checked and asked one of the female staff members who stated it was the correctly priced because the barcode was the same and I shouldn't worry about the description as it "doesn't matter"only the bar code. after an hour in the store I get my things to the till where the item rings up wrong so I asked them to get the girl who worked in that section whom I had spoken to. the price was now corrected as the female staff member said she checked it and it should be corrected. I pay and receive my slip only to be told by ,"Henry who says he is the manager that no I must now pay the difference after I had already paid. the difference is more than R100 .he was so sarcastic and rude.at this point I'd been there too long and this wasn't the first time i had to go to the till and find out it was a different price.they always said headoffice never let them know. I have always paid the difference or the price in the shelf so I was clearly upset. I said his customer service was poor and if he was the manager he should make sure the prices are correct on the shelves.he told me I should read and the law was on his side. he called me xenophobic all because critized his management skills of which he said he got from YouTube. He was so belittling and he literally took a situation which could of been dealt with in a calm manner and made it explosive. I am formally laying a complaint against "Henry" who would not provide his full name on paper and who Said he could not waste company resources to make me a copy of the receipt he was keeping. I know he has only been there a week but I won't be going to your store ever again especially if that sarcastic arrogant staff member is there. Calling your customer names isn't helpful Henry .A simple apology and acknowledgement of fault as your other staff had done would have been nice. you can't blame customers if you have the incorrect pricing on your shelves numerous times and don't correct that. that becomes your fault.i am Appalled by the lack of compassion and narcissistic behavior Henry displayed. clearly he shouldn't be the one dealing with customers. Also to take a short video not detailing everything that's happened isn't on. it's very childish.