Telkom still charging even after cancelling

I am absolutely not impressed with Telkom at all. We reported you on Hello Peter in February because there were problems with cancelling our line. We cancelled our account of the 2nd February 2015 which means our last day was 3rd March 2015. Well on the 4th March 2015 we received an account for full subscption as well as calls for R12.95. We will pay for the calls but when we received the account we went into Greenstone branch to cancel our debit order well suprise suprise Telkom goes and takes off money on the 27th March. We want answers because now when we went to Greenstone today we were told that the line is still active. I will not pay another cent to you guys and I want a refund for money that should never have been deducted. I want answers before close of business tomorrow 30 March 2015 otherwise I will be taking this further.