Missing Money

Little over a month ago, I paid Vodacom 3 months in advance covering my bill up to and including February leaving my next payment due only in February for March. After reviewing my statement with Vodacom via telecommunication and also visiting a Vodacom store, several Vodacom staff have confirmed that money is missing...some of their staff saying that my next payment is due at the end of this month... This is disgusting as no one can tell me where all that money has gone! This is not a small amount either, this is thousands of brands that I paid which is now missing!!! I refuse to pay Vodacom another cent and am visiting a legal adviser for advise on the matter!