Canceling my contract

I have been trying to cancel my contract with Vodacom for awhile now and not 1 Vodacom store has been able to help out with cancelling my contract and transferring the number to a prepaid service. I called the cancellations department with a Vodacom store member there and the cancellations department tells me nobody can cancel my contract until the 3rd of Jan. I asked to speak to a supervisor and was told that nobody can help me so I cannot talk to a supervisor. Disgusted by this type of service. A company as big as Vodacom and for 2 months nobody has been able to assist me with cancelling my contract.