Pay for not using your services

I have app**** online to cancel my services with Telkom about 9 months ago and i am still getting billed.

I attached all the required documentation at that time and have not received any confirmation or feedback on the cancellation of my services from Telkom. only a new bill stating that i owe them R6267.11. I have not used the services since the day i submitted the cancellation online as my line at home was constantly faulty ,

Spoke to Telkom customer services and they said that they have not received any cancellation request but it might be due to the system upgrade they were having.

i had to pay a refundable deposit when i got the line the first time, Telkom told me that i will get the R700 deposit back if i cancel my services one day but that did not happen.

So i would like to know if my services will be cancelled or will i be getting billed for a service that i am not using ?