Factory fault

I bought a DEFY fridge at Makro Alberton on October 31, I regret that day I went there in the first place. The top part of the fridge is working and my groceries are getting rotten, it's an expense for me coz we have to buy take aways every day. The technician came and fixed the fridge last week but it only worked for that day then it stopped working again. Everyone that I get hold of is giving me run arounds, they keep telling me the will get back to me with a feed back and they never do. I'm going to take this even further, it's like you buy then they don't give a damn about you. All Im asking for is a refund or a new fridge, I will spread this to the authorities because I'm fed up now. Pamela and Bonga said they will take this to their managers and come back to me but they haven't. Now they want to send a technician again, then I will have the same problems in future . I've had this fridge for 2 months now but it's feels like it's been years.