Telkom Line Cancellation Billing Incorrect

On the 31 May i put my cancellation in to cancel my phone line - this was my 30days notice request to telkom, who gave me a reference number - ********** 2 - i called in numerous times and was told it will be cancelled in time and before the end of June, after many calls later my line was cancelled on the 5 July 2018 . My last bill which was generated on the 10 July was supposed to be nothing as i left South Africa before the end of June, yet Telkom still charged me a full month of July. I cannot believe that i must pay R203.36 for something i never even used, this is a full months line rental charges, please explain why i must pay for something i dont even have. i am not even in South Africa anymore, why should i pay this amount? Can someone kindly respond to me via email and explain this billing system because i put in my cancellation on time and refuse to pay R203.36 Kind Regards