Dangerous Faulty Goods

I recently received a stores own brand toaster as a moving in present, just a cheap item until i could afford better. However, not long after receiving this toaster, i went to use the item one morning only to find that the toasting level could not be depressed for some reason. After closer inspection, i notice that there was a green wire coming out of the level slot inside the toasting space of the toaster. Where i had tried to depress the level the wire had become severed and had blown my electric system in my kitchen. I went into the store the same day asking for a replacement as this was dangerous and i now had to pay out for my electric system to be fixed, only to be told, that they do not refund items without a reciept faulty or not. As a supervisor of a store myself, i know that without a receipt, fault items should still be replaced as they are hazardous, so i asked to speak to a manager, who knew even less then the checkout operator, and refused to elaborate on " we don't refund without a receipt". I am extremely disappointed with the lack of care for there customers who have purchased or received their own brand products. Please help me to get the compensation i deserve.