No response for two weeks

Bought a fridge at House and Home Kolonnade on 22 Feb '15. Fridge was delivered on 24 Feb. Fridge light on but not getting cold. Phoned Defy to assist. They could not help. I phoned H&H and the consultant promised to phone Defy and then communicate with me. He didn't communicate and I had to drive to Kolonnade (I'm working in Gezina). He phoned them while I was there and he said their queries take three days so they will come on Wed 4 March. Defy sent a technician to check my fridge and the technician said the gas of my fridge is finished (BRAND NEW FRIDGE). Thurs 5 March I went to the shop and ask to speak to the manager, the cashiers told me the manager is out they will call the supervisor. The lady came and I explained to her and the sales consultant. She promised to phone Defy herself and call me after speaking to them. I told them I want a new fridge or my money back to buy a fridge at another shop. Since that Thurs 5 March no one is coming back to me. I lost my food was rotten and I have to buy takeaways everyday because I can't buy things to put in the fridge. I have a Brand New Fridge for two weeks in my house but its not working.