Faulty refrigerator and terrible after sales

I bought a Defy fridge that turned out to be faulty from Makro Woodmead beginning of September. I logged a service call two weeks later when the fridge door wouldn't stop beeping, I requested another fridge because these issues started less than 2 weeks after buying the fridge. It's 4 weeks later and I keep being told by Defy that the fridge will be replaced, no progress at all, lines to their phones aren't even being picked up for hours on end.