TOTAL LACK OF SERVICE AND INCOMPETENCE

I have cancelled my Telkom Landline per email on 30/09/2015. My line has, to this date, still not been cancelled and I have been billed every month since then. I have queried the fact that my line has not been cancelled - 6 x per email and have phoned Customer Service 8 times since end of October. I have been told on every occasion that my complaint is being ESCALATED. I received an sms on 11/12/2015 to confirm that a dispute has been created ref ***4. I spoke to Customer Serv again on 12/01/2016 to enquire about progress. I was told that it takes 30days for the system to register a cancellation and that everything should be sorted out on 14/01/2016 and a refund will be made from Oct 2015. After receiving my bank statement I noticed that a debit order AGAIN went through on 2/2/2016. I just spent 36min on the phone with Cust Serv and was transferred to Accounts, Accounts referred me to Sales and Sales referred me back to Accounts (spoke to Julia). Julia wanted to transfer me back to sales so I requested to speak to a Supervisor (Nosipo) who told me ONCE AGAIN that she cannot help me but will ESCALATE (for the 8th time since Sept 2015) my query. I am at a loss!!!