Cell number taken off network - Consumer Complaint for Vodacom - Head Office

Cell number was removed off the network after our numbers were blocked for non payment of the account. The account was 2 months in arrears, but also 2 months till contract ended. Not aware we needed to phone to cancel but never the less we were billed for top up amounts which we could not use as our phones were blocked. How can I pay for a service that was never rendered. Then they stopped billing us after 3 months and disconnect the numbers. Bear in mind we had 5 numbers on this contract. I have sent e-mails regarding my dis satisfaction but no response.