Problem to terminate contract

I submitted in writing and a copy of my ID termination of my data contract at this store on the 30 June 2015 applicable to the contract that expired on the 31 July 2015. I was surprised that on the 1 August 2015 that my contract was not terminated. I went back to the store on the 2 August 2015 and the clerk responded that some department of Telkom could not reach me by means of telephone to confirm termination and the request was signed of. IS MY WRITTEN CONFIRMATION NOT ENOUGH PROOF??? I asked the clerk to provide me with the telephone no. of this department so I can call them myself. Her answer was that their is no number available for this department and even the store themselves only communicate by means of e-mail to this department. I logged calls to Customer Services on the 2 and 3 August and provide additional contact numbers and time frame to be able to contact me but up to date no response and contract still active. It is hilarious that a Communications Provider can't communicate between their different departments by means of telephone.<br> <br> Please assist<br> <br>