Vodacom Delaying my contract cancellation

Vodacom can't simply help me to cancel my contract. i have been spending airtime on calls since 08 December and none of the people are able to help me. Skynet was hijacked with my order therefore they have to wait for investigation to conclude before they can cancel the order, while at the same time they bill me R1048 , how is it that i am affected because of a hijacked product? cancel my order and deal with that instead of stalling and keep billing me. the amount increased from R800 to R1048 like how really??? I'm so bored