Vodacom NOT cancelling contracts and still debiting account

<p>I was told at the Vodacom shop that I am not able to cancel my contract or change it to a top up or prepaid and should phone ********** to do this before the end of the month. I called the number on the 29th of July and asked to have my contract changed to a top-up account, I was told a new sim would be dispatched and delivered which i received a few days later. After receiving the new sim i put it in my phone and had a no service for the next few days, Ive just received my invoice for this month and found I still been charged R329.29 for the contract I no longer want or use! After calling Vodacom and speaking to a helpful but useless call centre agent Ive been told my cancellation is in its "final stages". How can it take a month to cancel a contract that has already expired. This ammounts to *****ing !! I want to know why it takes so long</p>