Telkom ignoring my cancellation instruction

<p>I've tried to cancel my telkom line several times. Sending the cancellation letter, follow-up emails, etc. But still I'm getting billed. </p> <p> </p> <p>I sent the cancellation letter on 24 July, expecting the services to be terminiated by end of August 2016 as per telkom. A service agent phoned me to confirmed the cancellation but said that they won't be able to cancel the line until my ISP release it, which was subsequently done. I received a bill in September from Telkom and emailed immediately on 8 Septemer again. </p> <p> </p> <p>I got charged again. Not sure what is left to do...........</p> <p> </p>