Long standing issue

I am starting to believe that this establishment (Cell C) only appreciate my premiums and nothing else, the worst customer care I have experienced. Very soon I will be marking a full year without a phone and this is all thanks to Cell C. No one at all from both CSurance and Cell C Customer care seems interested to assist. The customer care process is all over the place, no precise accounting of records. Every consultant that picks up my grivience keeps on asking for the same information I have been furnishing since I logged my query. I have even picked up that they conform to the same pattern of delaying... I cannot believe I have been consistently furnishing them (Cell C) with proof of my excess payment for nearly 2 months now. This is how after 10 years with this establishment my relationship ends. All I am asking now is to be refunded what is due and entitled to my name. Can I have my + R6000.00 per my insurance contract letter because it does not seem I will be in possession of a phone from Cell C in this lifetime. PS: I don't want anyone from Cell C paying me a call, all I want is to have what is owed to me. I have endured nothing but misery dealing with Cell C for the past year, mind you I have been continuing to pay my premiums without a device. They know where to find me when they need to send me a statement but they somehow cannot seem to have any idea when it comes to turning around my query.