billing errors

I am so annoyed with vodacom. I had two contracts with vodacom. The one cellphone contract expired in October,thats when I phoned customer care and cancelled the contract . However since november they are still debiting money for this number that I have not even been using.And please note they are deducting different smaller amounts,and not the whole subscription fees like they used to. So they cant tell me i didnt cancel the contract because why all of the sudden are you billing me a different smaller amount than what you used to. I have been calling customer care since April to sort this problem out but they keep sending me invoices for a number that does not even exist anymore.I called last week,yesterday and today and they keep sending me to a next department,and letting me log service requests and not giving me straight answers.Today was the last straw.I refuse to wait another 72hours for them to get back to me. All i want is the money back that you have been taking from me since november!<br> <br> .<br> <br>