Cellphone Insurance Dispute - incorrect billing

I had made a call to Finrite in the first week Jan 2019 to cancel my device insurance (iPhone 7 128GB Jet black) that has been active since December 2016. Telkom was then billing my account ever since and after endless calls with Telkom, the insurance was then cancelled on 2019/09/05.

I need to be reimbursed the R244+ from January until September because Finrite DID contact Telkom and the order was made on 2019/01/06. I called Finrite to double check on their side as to whether the insurance was cancelled and that was confirmed with me that it was cancelled since January 3. They also confirmed that they did, in fact, notify Telkom of my cancellation and that the insurance from their side has been inactive ever since January 2019. Finrite mentioned that Telkom needs to check their orders and waiver the amount to date because even if I had made a claim with them; it would be invalid as the device is no longer covered.

Telkom is now telling me that they don’t promise to reimburse the R244 that I was billed on since January.

This all amounts to around R2200 of incorrect billing from Telkom. The last call with Telkom was 2019/09/18 at 16:17.

I am VERY dissatisfied with Telkom and their service, and I NEED URGENT response on this matter or else I am cancelling all my products from Telkom.