3 Months later, Account still being debited!!

I cancelled my device insurance which I took through Telkom and the company administering the insurance is Finrite. Now I called finrite to cancel my insurance and they sent me proof that they have cancelled the subscription. They went as far as telling me that my payment in September would be the last one. I phoned in again in October because they had debited the money and I was told 'actually the last payment will be at the end of October' they sent me proof that they have cancelled everything, I even went through their complaints department and I was told that Telkom direct has been notified about the cancellation , all they have to do (Telkom mobile/direct) is remove the amount from my bill. I am telling you 3 months down the line I am still singing the same song. I have spoken to various people, supervisors , complaints officers and all have not been able to help me. They do not keep their promises which is actually a breach of contract or agreement. Imagine if I did not pay my bill , you would harass me with phone calls or blacklist me. I wish there was an option to blacklist a service provider. So , here I am again being charged for an insurance subscription that has been 'cancelled' I have been sending my documents back and forth. I spoke to Ngwenya S (Sbongiseni ) I think the name is , but his email address is ********** and It did not bounce, check spam , everything) , sent him an email twice. Today I spoke to Lesego Moeketsi at 09:36AM her superviso is Sibongile Malinga. At the Finrite call cetreI spoke to Themani. Please get back to me and please dont tell me to send you documents , asks you call centre staff. Im sure more than ten of them have my docs but nothing has happened since.