FAULTY APPLIANCE

I bought a fridge online and it was delivered on Thursday last week, i waited 4 hours as stated in the guide then plugged it in on Thursday evening. When i woke up on Friday i put items in the fridge and i left the house only to come back yesterday to spoiled food. I have sent an email to customer care as i could not get through to their phone lines. i even tried to call the Menlyn Store which the Fridge was delivered from and the phone just rings. I am so frustrated right now and no one is calling me back.The fridge is on but it's not getting Cold!!!!!!!!!!!