Cancellation of line - SHOCKING SERVICE

I sent in a cancellation of my Telkom land line on 6th Dec 2017, which was ignored (servcancellationtelkom.co.za). On 24th Jan 2018 I sent it in again and was advised via return email that cancellation would take 21 days (same email address). I spoke to a lady by the name of Yolandi in cancellations who advised that she would to sort it out. To date, 7th May 2018, my account is still being debited by Telkom and further emails have not resolved this. Telkom you need to get jacked up & get back to me - shocking service!!!!