Still prolems with a paid up premature cancellation with Vodacom

I complained about a premature cancellation with Vodacom previously. A gentleman was very nice to help me. But we had a problem changing a password for a sim on a data contract. Strange enough we received yet another for the bill for the contract that was after my last complaint cancelled with immediate effect. The call centre lady that I spoke to informed us "WE HAVE TO PAY" as according to her system the contract is still active. I said it the last and will say it again. Vodacom get rid of your *********** staff!!!