Vodacom ****s

What happened to Vodacom? They used to be a top class company but has stopped caring about their customers. I complained about them getting a 2 year contract from me by supplying the wrong info that amounts to ***** (on Xmas day). Their response said they have rep**** privately - a lie, never heard from them. I repeatedly phone their cancellation no *** to be told they have high call volumes, they have not responded to 5 e-mails but they take my money on the 1st. This is nothing short of theft. In addition my husband buys airtime every month and it disappears on a daily basis until nothing is left, also theft. Can someone please tell me how to stop them?