Vodacom keeping accounts in arears even after payment was made.

Once again please people DO NOT consider Vodacom as an option for contract deals. They keep contacting you to let you know your account is in arears and the amount that needs to be paid. Once paid they contact you again informing you of a new amount in arears. I have asked for a statement from last year January so I can see where it went into arears as I know I have been paying every month. I am still waiting for my statement. DO NOT ENTER INTO CONTRACTS WITH VODACOM!!!!!