Incorrect Billing Resulting in Overpayment

<p>On the 13/03 I called Vodacom to cancel the additional 1gig of data that I have on my contract as I had recently upgraded to a better contract and no longer required this additional data.</p> <p>The cost of the 1gig of data is R 218.42 excl. VAT and I have been billed for this additional gig from April up to and including my most recent statement.</p> <p>I expect that the overpayment be refunded immediately and that the 1 gig data be removed off my billing.</p> <p>I have a voice recorded call of my initial cancellation request in March.</p> <p>This is unnaceptable!</p>