Nedabank refuses to stop an ******* debit order on

On 27 October 2015 i wrote to my Nedbank banker about an ******* Telkom debit order that was comning ff my account despite me not having a Telkom account. I was promised it would be sorted. On 31 October I wrote again after seeking confirmation that the debit order had been stopped and also asking for details on how i can go about closing my account should the need arise. My banker alleged that he had passed on the instructions and would get back to me. I have since written two other times to Nedbank (after realising that the order is still going off) and I have not as much as received an acknowledgment of my email nor a response on the process to close my account.