Cancellation of Contract - not actioned

I took out a data contract with Telkom Mobile for R399. My contract with telkom mobile was scheduled to end in October (no one could advise me the exact date of expiry until I received my new bill of R905.00). I immediately went into the store on the 5th of October as advised by Telkom, at least 20 days notice was to be submitted for cancellation and also logged a dispute for the billing issues. I could not comply with this submitting my cancellation docs in advance as I did not know when the contract is ending and how much I will be paying after contract expired. However upon my visit to the store on the 5th I cancelled my contract and completed a cancellation form. To date, the cancellation was never actioned and I was advised that the store never submitted the cancellation. I went back to the store and was advised that the agent responsible will phone me back the same day... 6 days later and I still haven't received a response. I've been phoning the customer service number daily but nothing is happening. I have today been advised that the store submitted the cancellation on the 03/11/2015.