Disrespected and Disregarded!!!

I went to buy a Downy Queen Airbed on 27 March 2015 at 19:50. The price on the unit said that it cost R249.00, when i got to the Cashier she scanned it and the price was R299.00. I enquired this and walked with the Cashier to the place where i got the Airbed to show her that it clearly says R249.00. I stood at the Till for about 20 - 25 mins, while Anthea who i assumed was the till supervisor, came to fetch the Bed, walked it to that dept and came back with Terrence the guy who helped us get the Airbed. They stood there having a little meeting and then just came to the cashier, said it was old stock, voided the other bed and said just scan this one, its from the new stock and left, saying it's the same. Not once did anyone apologise to us for the long wait, they did not even make eye contact with us, no one explained anything to us it was as if i did something wrong as everyone looked so upset. I enquired with Fahiema after this total disregard towards us, what their policy is with these kind of mistakes, and she said they are supposed to give us double the difference. When i enquired about this, Anthea just ignored us, and did not even bother to look in our direction. DISGUSTED!!!