Refusing to Cancel Account after 4 attempts and continuing billing

Telkom you have been billing and debiting my account for 3 months after my cancellation should have been effected. I have cancelled my account in August by filling out your form and emailing it to the address provided. I got the automated response and yet nothing happened after a month. I still got billed. I have since called in 3 times and have been given 3 mail addresses of individuals in your organisation to which i have sent the proof of cancellation but have not received any response and yet still i am being billed every month. I have mail traces of all of this. I received an SMS from you on 09/11/2017 saying that you are sad i am leaving etc. and yet today i got a bill for December!!! How are you so incapable of managing a simple process such as cancellation of a line. I have even tried going into your stores only to be redirected to a telephone call to which the operator asked me then to mail them - and never a reply from them and no action taken. This is **************** - you have shown how ************* you are as a telco in this country. Shame on you!