Landline still active after cancellation (4months)

Good day, I cancelled my landline via email with all to documents needed in November 2015.<br> <br> I understood the 21 days wait time, but in January I received a bill again. I emailed all the relevant documents again after visiting Hatfield Plaza store. Which was a total waste of time!!! What is the use of having a store if I cannot cancel or discuss my account with them? They said I must phone telkom. Why do they get paid?<br> <br> My serv no. ***. Since then my account has accumulated, although my numerous attempts.<br> <br> Please cancel my line and you have to scratch this debt which is due to lack of service from your side