Went clicks phumulani mall in tembisa to buy purfume

Went clicks phumulani mall in tembisa to buy purfume. When I got there, there was 2 prices for the same product. So I go to the till when they scan the purfume it showed a third different price.. The cashier accompanied me to where I go the purfume they saw the prices and I advised them that I want to pay the amount I saw. The cashier refused and said no you have to pay the higher amount even after they also saw the 2 prices.. I just left the purfume and left the store