Contract line cancelled. Still being billed

I cancelled my contract line last year, 22 May 2014 between 8-8.30 am when I called Autopage cellular and spoke to a lady by the name of Patience.<br> She transferred me to credit control so I may cancel my contract.<br> The reference number for the call was ***.<br> I have never used that line since as it was cancelled and so I was unable to use the line, naturally as I had asked for it to be cancelled.<br> My contract was upto date at that stage.<br> Almost a year later I got a call from their attorneys on the 21st April 2015 informing me that I owe Autopage an outstanding amount of R1600. The number the lady called from was ***<br> I am shocked, Surely this cannot be correct as the line was disconnected and I was not using it. She implicitly stated that I owed that amount and that was that. How can you just owe R1600 after a year of no service.<br> This is really upsetting. If I was going to be billed then I should be given service and if the contract is cancelled how can I be billed?? Quite baffling indeed