STILL UNDER WARRANTY AND CONTRACT BUT FAILED ME

my Blackberry is still under contract and when it kept heating up and switching off yet the battery life is fill I was told it needed its software upgraded and then all of a sudden he battery charging point refused to charge and so I handed it in to Vodacom Old Fort Road for repairs as I have done with previous contract phones and this time it went to JHB but was back within a week untouched, they claim its beyond economic repair so why did they not replace the handset as they have always done with previous contracts with refurbished units. I am told they cant upgrade software as the changing pins damaged and they cant repair so again why am I not replaced with a refurbished unit like previous contracts sent to them when they cant resolve the issue <br> I find this lack of concern and attention despicable as I was told well there is nothing we can do <br> I am without a phone now