Poor customer service

On Sept 25th 2014 I booked my blackberry contract phone for repairs at Telkom Mobile. I have thus far not received my phone back from the service provider despite numerous follow ups with the service provider at my expense. At some stage I was promised a replacement instrument because they were unable to fix the phone, till to date nothing has been reslolved, instead the shop consultants keep on shifting the blame on their service centre whom I don't have direct contact with. Save to say that I continue to pay my monthly subscription even though I am without a phone for so many months. I believe that I have exercised enough patience with everyone in the shop. I now desperately need a new phone as I cannot keep paying for something that I do not have.