Canceling Debit Order

<p>I have been trying since 2012 to cancel a debit order what it is for I don't know</p> <p>Tried phoning accounts - can never get a reply</p> <p>Tried emails to Telkom ********** ********** ********** no reply</p> <p>Visited Telkom shop - they have no idea what this</p> <p>Tried Hello Peter</p> <p>The trasaction details is TELKOM SA ********** 05-6</p> <p>Where to from here?</p>