Father's day out ruined

Hi. Saturday the 20-06-2015, i planned to buy my partner a phone for Father's day.We walk into the store and we were approached by a lady by the name of Bianca. My partner told her he wants the phone in the window for R1149.00, she took the phone out and proceeded to ring up the sale . Upon paying with my debit card , as i paid cash for the phone, i saw that this Bianca woman punched in R1499.00, i queried why she was charging me more and she looks at me as if im mad. I told her the phone is R1149.00 and not R1499.00 as she punched in. She went out to the display window to check the price and came back telling us that she cannot give us the phone for that price, we obviously asked why not and all she said was she cannot. We demanded to see the manager where upon she tells us she is the manager. Not once did she apologise for the inconvenience , she was so abrupt , rude, unprofessional. If she really is the manager then she sucks at her job and should be sent for customer service training. She ruined his day because he was quite upset for the remainder of the day and i would like to know what will happen about this. He still wants the phone by the way . Bianca MUST be dealt with