Continued debit order, months after account was cancelled

Telkom continues to debit my bank account, months after I had cancelled my contract with them. Not only that, they also debited my account 3 times in the past month.

Stopping debit orders from Telkom isn't effective because there is one thing that these government-run ****** are good at, and that is making sure that the debit references change every time so that the cancelled order isn't recognized.

I will lodge a complaint with the Ombudsman and continue to reverse my debit orders. I've also forwarded the issue to my legal department. Please don't bother replying with your generic replies.