No integrity Vodacom

I was due for upgrade and was called by Voda agent and upgraded, before the upgrade kicked in, I called for a reversal as I decided otherwise to rather upgrade with a handset,that was June, the reversal was never processed, I called 6 times every time I'm being told it was done, this is really frustrating, I feel very helpless, I have learnt my lesson never to upgrade via agent, I even cancelled their we grow voucher but the deductions are still continuing