still being debited for a service I canceled in 2015, support isnt able to help or escalate

Im am still being debited for a service I canceled in 2015. I have Gone into your both monile and Telkom stores, spoken to customer support on the phone multiple times. Sent multiple emails, tried to block you on my bank but debits get reissued. Every month 79.70 for an old 1GB ADSL account from before 2015 that was canceled. you send me emails and shows on my bank statement every month but your support teams cant find the service on your system, so they cant help me, They cant even give me reference numbers or call me back because they say without a phone number linked to my account they cant give me a ticket number to follow up on ... No one can help me , so at this Telkom debiting money could be argued theft. Please if someone at telkom reads this , please escalate to someone who has access to your banking to stop the debit orderes and refund my money because I am getting no where. It seems you cancelled my service off your software database but your finance database doesnt no about it and your support teams cant help, or escalate to anyone who can help . The longer that this goes on the more money that is being taken from me and this could end up as big case if not addressed by someone.