Know where your monies going

My phone was ****** Vodacom continues to charge me for the use of my ******phone then the ****** phone was upgrade recently and to my bank account. I hardly use my phone but Vodacom finds it possible to charge me R1,333 -R1,700. I did not use my phone at all for Aug but the charged these huge prices I was in the mean time using Cell-C pay as you go I paid R300 for the whole month of normal use. I wrote to them and they rep**** saying they were putting my problems into the BACK ROOM. Never got anything sorted at all. One of their consultants shouted at me for complaining that a phone had been charged to my bank account AND SAID"DON'T iEVEN HAVE IT IN MY HEART TO LET THIS POOR MAN HAVE A PHONE ON MY ACCOUNT?