6 Months to cancel a contract!

I am so disappointed with Telkom. After being a loyal customer for years, I decided to cancel my contract with Telkom as I got a better deal elsewhere... This was in September 2017. I signed the cancellation form and emailed it through to cancellations which made this a legal document. I then waited, and waited, and waited for feedback... nothing. I followed up numerous times only to be passed from pillar to post and to no avail. So by December after all my attempts to get hold of Telkom and one consultant even telling me over the phone that it is "not on" that I have not been assisted as it was way past the deadline and the contract should have been cancelled already, I decided to stop my debit order as I am now seeing this as ********** transactions. This did not help as telkom simply changed the debit order amount to WAY more than what it is supposed to be and deducted my account once again in January. I contacted my bank and reported the debit order as ********** having to pay a fee to cancel and stop the debit order once again!! I am so irritated at this stage as telkom has FINALLY phoned me back, 6 MONTHS later only to tell me that the contract is now cancelled and I still owe them the money because I stopped the debit order and utilized the data. This is not my problem as I have spoken to numerous people including Khadeejah Dumisile Mwandla, Portia Tsotetsi, Vuyiswa Mbele and ********** and not one of these people even tried to assist me with my query... just passing the buck to the next person who is just as ***********. What ever happened to customer service?? I work in the customer service industry and never in my life would I treat a client this way, it is disgusting!