Rude and sarcastic

I went to game store to return a camera i had bought 7days prior as the lens was no longer retracting when one switches the camera on and upon arrival i was told by the customer service consultant that she would have to book it in for repairs & inspection and cannot exchange is as per their policy that should a product defect or malfunction within 7days of purchase they (game) would exchange or refund the product. I requested further clarity and when I got to the manager by the name of Rene Augustine she was sarcastic and rude and was throwing her hands at me and shouting that the condition was contrary to the date of purchase, meaning I'm lying regardless of having produced proof of payment and even went on to say I must just go straight to Canon and just left me standing there and went and attended to other things without ensuring i fully understand the procedure and fully understand. I felt humiliated, disrespected and undermined. I request firm action against such behaviour and i would like to get a written and verbal apology from both Game senior management as well as Rene and assurance that such will never happen again neither to me nor anyone else.