Vodacom insurance poor service

I cancelled my insurance in November, but has since still been billed and charged. Nov, Dec and I am now billed for January. Can it really take up to 3 months to be cancelled? And there is absolutely no assistance. I call the contact centre, then I'm instructed to call insurance, because they cant see a cancellation captured. U call insurance, after holding for 45 min to an hour, the call is dropped in your ear. I find this very disturbing!