Disgusting Service from Game Trade Route Mall

Last year I purchased a Sunbeam heater from Game at Trade Route Mall - Lenasia. Last week the heater stopped working. So on Saturday morning, I took the heater to Game at Trade Route - Lenasia Mall to return the heater. I spoke to a lady at enquiries, and I explained that I did not have the receipt. She asked me if I used the card to make the purchase. I told her, I think I did. She then asked me to go through my bank statements. I had to log on into internet banking while standing at Game and go through my bank statement. To my luck, the internet was slow. I then asked her if she can check on the sysytem with the bar code, she said that they cant check on their system. She said that she has to log it to Game head office and this could take anything from 3 to 4 weeks. I then asked to speak to the manager. The managers name is Sylvia. I had to explain yet again what happened. She then said that it would take 1 week for head office to check. She then sent another lady to log a query. I kept on asking for a reference number and she kept on saying that she will call me with slight annoyance in her voice. With all due respect why does it seem like they were doing me a favour. How are people supposed to remember how they purchased good. Was it cash, voucher, credit card or debit card?????The service is terrible and the staff at enquiries look at you as if I am disturbing their tea time. If you are not a people's person and not willing to help, then what are you doing at customer service.