Cannot get my contract cancelled

<p>My issue is my ADSL contract has finished in February, I subsequently canceled my Telkom as per their procedure. (Filled out the cancellation form and sent it to the cancellation department. )</p> <p>To end 30/04/2017. </p> <p>Since then I have called numerous times and re-emailed this to them 7 times. </p> <p> </p> <p>When calling they ask me to send the letter again to the person I am calling and they will arrange my refund and cancel the contract. </p> <p> </p> <p>This is not happening and they keep taking money from me each month. </p> <p> </p> <p>Please note, that prior to the cancellation Telkom`s service has been great. </p> <p> </p> <p>Can this be sorted out, please?</p> <p> </p> <p>I need a refund for the months after April and the service canceled. </p> <p> </p> <p>Regards</p> <p>Ivan </p> <p> </p>