7 Day return policy

On Wednesday 9 Dec 2015 I upgraded my contract with Vodacom and received a new handset. The handset started giving problems with blank screen, freezing, black outs when I tried to answer a call as well as when I tried to make a phone call. On Saturday 12 Dec 2015 the phone all of a sudden displayed lines and a mixture of colours across the screen making it impossible to use the phone whatsoever. I took the phone back to Vodacom and asked for them to replace the handset for it was faulty from the start. They refused to replace the phone and set they need to send it in for analysis to determine the problem. This is a 3day old handset and is not suppose to malfunction. What is the use of a 7day guarantee policy if vodacom refuses to exchange a faulty handset? Now I am stuck without a phone, traveling abroad in 2 days and have not received any feedback yet. This is unacceptable and I would rather cancel all contracts with vodacom than sit with this utter frustration. I never fail to deliver when it comes to debit orders each month so why can't vodacom just provide the type of service they promise when they take your money???? <br>