Damaged cell phone

I think Vodacom must extend their out of box guarantee from 7 days to 30 days. I had my phone for 12 days and it just died on me, it cannot be switched on. I took it back to the store who sent it to the repair center. I got my phone back last night and this morning the same problem. Now it is booked in again. I must pay my monthly subs otherwise i will be blacklisted, but i am paying for a cell phone i don't even have.<br> It is not my fault the device is faulty, why can it not be replaced? Also, the repair center damaged my screen and also the bottom of my phone? My contract started 29/5/2015 and the 1st time my phone was sent to the repair centre was 11/6/2015 andi got it back 22/6. Now it is booked in again on 23/6 with the same problem. This is a manufacturing fault. The assistant in the shop told me they have had another customer with the same problem and had to replace the device. So why not with me???? Any other product like a hairdryer, kettle etc you get a 1 year guarantee, never mind 7 days.<br>