Vodacom Insurance does not cover the phone Vodacom provided

I have been a Vodacom customer since 2000 and I have 6 contract Vodacom services that I pay for monthly. One of these is Vodacom Top Up contract with a Huawei phone and insurance. The phone was replaced by Vodacom under a warranty claim. I submitted a claim for water damage to the phone. Vodacom insurance rejected the claim. It appears the details of the phone were not updated after the phone was replaced. The insurance call centre and regular Vodacom call centers can't provide any suggested means to resolve this or even an explanation of what should have occurred to prevent this. It's frustrating to pay for insurance for years and then find out that I do not have cover.