Beware vodacom insurance

I have a phone insured with vidacom and i would like to cancel it as the phone is old and they refuse to insure the new one. I phoned cancellations and they assured me the insurance is cancelled. Niow get bounced around between agents. They dont want to cancel the insurance (which is double what other insurance costs) once they have their hooks in you they never let go. A very shady ******* company