unfair customer treatment

Me & My wife went to Pick n Pay in Edleen Kempton Gate, Kemptonpark . we had the Old R200 note that we withdrew from an Atm. we stood in line to pay for our Items and when we about to pay the teller call one of their managers and asks if we could pay with the note, the manager called Leornard looks at our note and says no they note is out of circulation they do not accept it. now i ask the manager what do you mean you don't accept the note as i just withdrew the money from an atm? he arrogantly and in a loud voice says we do accept this note. There is no notice anywhere in that store stating that the old note is not accepted anymore!!!! there are notices everywhere but not that one...how am i as a customer supposed to know that the store does not accept my note. the manager made us feel like ********* who are trying to shop with **** money,,, i was never so embarrassed in my life!!!!!! Funny thin is we went to a store next door and purchased with the same money Pick n Pay refused to take.... the thing is with some thing like this there should have been a notice as big as the adverts in store to alert customers.. THIS TREATMENT WAS EMBARRASSING TO ME AND MY WIFE AND MOST OF ALL UNFAIR TO US