Reversed Debit Order not reflecting on account

On 30 March 2015 there was a debit order that went off from my account from Digicash a company that I do not know and have no previous interaction with. I called the Absa call centre to find out who this company is and if it was possible to reverse that transaction as I have no knowledge of the company. I was provided with the contact number of Digicash to find out what this debit order was for. I was also advised that it is possible to reverse this transaction by going to the bank with my ID document and requesting to reverse a debit order. I called Digicash who informed me that they were requested by a company named Khonaphambili, a company I don't know, to run the debit order. On the 4th of April I went to Absa bank to reverse this transaction, I was assisted by someone who after working on his computer for a short time advised that the debit order had been reversed, he didn't ask me to sign anything as proof of this, I checked my balance at an atm, the money did not reflect. I walked away thinking that the money would reflect at a later stage. A week later, after viewing my statement, this reversal still does not reflect on my account.