Really bad attitude from a floor supervisor

Saturday i was at the Pick 'n Pay in Mulbarton to pick up a few things. when i reached the milk isle, there was a paper add against the shelf saying \best choice at R54\" so i ask the pick 'n pay employee for which milk does it ally, and he said \"well the add on the shelf doesn't specify that it's full cream only so you can chose any milk for that price', so i took the 2% low fat. when i reached the till it rang R77, so i told the cashier that it's not correct. he called the supervisor who threw an add pamflet at me to show me it's for full cream only. so i told her that the add on the shelf does not specify that. so after they changed the milk for me, i saw the supervisor had all the paper adds from the shelf in her hand and requesting the team in the office to change the add. so two things really upset me, first the add was wrong so i should have been able to take the 2% low fat for R54, and secondly the way the supervisor threw the add at me. it's a matter of principal and ethics"