Bad customer service

Today at about 12:45 i visited Shoprite Liquor store at rustenburg and i was assisted by Maria. I bought Russian bear at the shelf the price stated R119 but when i got to the till she told me its R125 i rep**** her that is not the price i show i ll pay for the price i saw on the shelf. And shr told me its the 1st today so the price are increasing they are busy changing the price. But i refused to R125 she was not friendly and aggressive. I asked her to call the manager and she said she is the manager. I think she is in the wrong position. I ll never visit the branch again