Telkom does not acknowledge cancellation email

My landline and internet have been down for two weeks to date. I reported the fault three days after the lines went dead and was given a number: ***8. Nothing happened, so after six days I decided to cancel my landline. I called to do so, but was told that I had to email ***. I have received no response from Telkom. I am worried - is Telkom going to acknowledge my cancellation, or wait a month and then charge me R1000+ for a service I did not have and for a line I do not want?