Pathetic service

My sister bought a washing machine around early April at game in Southgate mall and the unfortunate part is that she bought the washing machine cash unfortunately we have lost the receipt when we moved and cleared space in the house, now we have a challenge because the dryer of the washing machine is damaged and we cannot get any assistance, we called Samsung customer care and related the story and they referred us to game in South gate went there today and unfortunately we were treated in a condescending manner and given attitude neither were we given a chance to speak we were brushed off and told that we need to go back home and re think as to when the purchase was made like iam mad right now, what happened to customer centricity and empathy your service sucks like the attitude that cashiers have at times makes me sick to the core