Worst Cellphone purchase at Edgars

I bought cellphone at Edgars East rand Mall and within 24hours the phone started freezing could not do anything and had to return to the store and they said they need to book the phone, they could not refund or let me choose another phone. 3 weeks later the phone return and they say technician says the is nothing wrong. I asked to change the phone they refused from top management. I took the phone before I could reach home the phone froze again I had to go back. I ask to change the phone as it has inconvenience me but they refused said it need booking and its only technician that can give them a go ahead. I asked to see their policy regarding that but no one had any idea where to get it the document waited till I left the store without a phone.

This is unacceptable as their phone was faulty within 24hours which they could have exchanged the phone or refund. I did not buy the phone to their Vodacom technician rather the store but store could not help me even today going to second month without a phone.