Trying to cancel DSL fastest line

On 25 February 2016 a cancellation requested was submitted for the cancellation of a DSL fastest line effective immediately. An acknowledgement of receipt was received within the hour. The latest invoice reflects that the DSL line is still being charged for.<br> On contacting 10210 Ayanda confirmed that the service had not been cancelled and said that the cancellations department would need to be contacted. Again dialled 10210 and spoke to Linda in cancellations. Was told to phone *** - this number does not exist. Again dialled 10210 and spoke to Ntombi who said to dial ***. This number is either out of order or off the hook as it is constantly engaged.<br> Please could you assist with the cancellation of the DSL fastest line as this should have been cancelled weeks ago.