Defy proof of warranty on your head

I bought a Defy fridge freezer from Game in Cresta some 2 or 3 years ago. During that time the deep freeze part stopped working. This was duly fixed albeit over a 1 month period of time while still under under warranty. The appliance has a 5 year warranty. Recently the same problem occurred again, but unfortunately I have mislaid the original purchase slip from Game showing that the appliance is still under warranty. I called Game who suggested calling Defy to see if they could help. It is strange that Defy cannot locate this fridge freezer on their system. If your cellphone number is not on their system you have had it!! You will pay cash for the repair. They have no record of previous repairs containing information like serial numbers, model numbers, etc. To me this is just pathetic. In my home I have many Defy appliances, but I will not buy any more. The service lady says I will have to pay R630 .00 call out fee and R170.00 per half an hour for an appliance under warranty. Why can't this useless supplier have a system with serial numbers, date of purchase and history of previous issues. In my mind Defy is pretty pathetic, but once again typical South African careless company, where the customer is far from first in their minds. You just sold me your last appliance!