No service yet debit order running and handed over

I had a pre-paid service that I wanted to convert to a normal line as I wanted to activate an uncapped internet service. Telkom then de-activated my pre-paid line and created a business line with the internet service linked to it, which was not my request. Neither service has been active since September 2015 but my banking account has been debited for the pre-paid service every month and I am receiving threatening sms and letters for the fixed line and have just received a message from a collections agency to confirm that my account has been handed over due to non-payment. I have contacted the contact centre and have been given numerous references and spoken to numerous people and even received a message on 30/09/2015 advising me that a dispute has been created with yet another reference number. The call centre also advised that they would stop the debits to my account but nothing has transpired. I also attempted visiting the very helpful customer service shop at N1 City Mall in Goodwood, Cape Town but these have been converted to sales shops and the only service available now is via the Call Centre that offers no service at all. How does one go about receiving service from Telkom