Vodacom Insurance continue to bill me

Cancelled the insurance on a phone late last year. Vodacom confirmed that all was cancelled. I just received the statement now and they continue to bill us although a cancellation was confirmed. Tried to phone in, got bounced between 3 departments with the last department not answering despite several phone calls and waiting forever.... We are stuck with this. I have 2x Red Contracts, 1x standard phone contract and 2x fibre contracts yet I'm left stuck now with poor/no service