Poor poor customer service

I bought a logic heater at Game Jabulani mall on the 27 April 2015. I used the heater from then until day before yesterday,then the heater died. I lost the slip, so i went to game with the heater and they referred me to their customer service department. We i got there i found this lady speaking on the phone, i had to wait untl she was finished. Once she finished i greeted her and told her that i the heater broke and i lo st the receipt. She snapped as if i had said something silly. I tried explaining that it was not my intention to lose the receipt, and that Logic was their brand and their the only one's selling it,maybe they would be able to trace the transaction by the bar code or something, i even told her what else did i buy when buying the heater. I have never seen or heard of someone rude as her, more especially who works with people. I got frustrated and she went to call her manager who is such a good person,she doesn't even respect that poor manager she was still disrespectful towards him. Zanele Mwelase from Game Jabulani mall is very rude and behaves like a strat mate. We do not need people like her in our stores. I think she must try another career or something.