Cancelled Vodacom cellphone insurance but still showing on the statement 2 months later

Inefficient service from Vodacom insurance - I cancelled cellphone contract on 3rd December 2024. In January, I noticed the insurance was billed and contacted Vodacom and I was told the insurance has been cancelled. Today, 18 February, I contacted Vodacom again and I was informed that it was not cancelled due to a system error, however they would not be able to cancelled it because I have an outstanding amount of R170.