Account CANCELLED... STILL being billed

I cancelled my Telkom account more than 2 months ago, and was told by a yawning call centre operator that everything was in order, I would not be charged anything from that moment onwards. I am still being billed!!! Due to being too busy to monitor some of my emails, I only noticed that a debit order went off in March before it was too late, and now I see that another one is about to go off.<br> <br> This is unacceptable. Please close my account properly and refund last month's debit order that you took even though I asked to cancel my Telkom service with sufficient warning.