Unfair treatment

I was treated unfairly by vodacom I bought a phone end of July by September it acted out I took it to VODACOM in greeanacres for it to get fixed which they said they are giving me a new phone because it's a factory (manufacturer) fault.A week later the phone did the same thing again. I took it back for it to get fixed(I'm spending R200 for transport each day I'm going to the store).A week later I call to ask on the progress of the phone and they said it hasn't been taken to get fixed because they can't open the phone(which they did not ask me for an icloud password or anything when I booked it in).I wrote a detailed email to explain the problem. 5 weeks later opposed to 7-14 working days I recieve a 92% refund.