Pathetic Telkom Mobile service

I stopped being a Telkom Customer on 31 December 2021 yet I continued being charged for device insurance. After numerous calls to their call center I was advised that I needed to cancel the insurance with their 3rd Party Insurance company. I cancelled the device insurance with the 3rd Party on 7 July 2021. I was advised that cover would lapse in 7 August 2021. Why then does Telkom continue to invoice me for insurance?