Incorrect labelling

Just popped in to the liquor store and bought klipdrift & cola as the price stated on the label said R67.99, got to the counter and it came to R96.99..queried it with the manager who told me that a customer moved the label there and his refused to give it to me for that price,also told me to read next time I buy something was very upset because he didn't wanna acknowledge that his staff made a mistake and he didn't want me to show him as well, as a loyal customer I don't think that he was fair towards our argument..I would rather spend a little more money some where else then have to deal with such disrespectful managers