Telkom

I had two wifi devices with telkom and cancelled both on their cancellation platform and received sms to notify me someone will phone me "but this never happened". I also received a sms to notify me that the accounts will closed after the next month bill.4 month has past and still I receive statements on deductions for the wifi accounts. How is this possible after some many time consuming phone calls to their call center and the agents confirmed that the accounts is closed they still deduct money. I would like to get them to stop taking my money for I service I do not get from them.