Tired of waiting

<p>I app**** for an iPhone 6s at mtn, which was successful. I went and collected the phone around May on a Saturday. On Thursday the phone froze and I took it back to the shop on Saturday which was 7 days after getting it. They took it and said they taking it to repairs and they will called after 3 weeks. 6 weeks passed without any call I went there and I was told a lot of stories. My phone was never attended to because it was locked and they needed me to unlock it goes them to diagnose it, and no one cared to call and ask me for passwords . I unblocked it and they said they will call me to come and pick a new phone. It's almost 4 month without a phone which I only used for 6 days and mtn is busy deducting R399 instalment as if I have the phone.i feel ****** and helpless</p> <p> </p>