DOES VODACOM HAVE CASH-FLOW PROBLEMS?

With Vodacom's invoice delivery being unreliable, I've been paying my account at the beginning of each month by EFT. Having done this also this month, they keep sending me messages and phonecalls telling me that I'm in arrears. Firstly, I phoned them, wasting 17 minutes of valuable time. Was told that there's a delay in the system, but everything will be sorted out. But that didn't happen, the reminders and phonecalls just kept on coming in. I've sent an e-mail, which was acknowledged with an automated reply, assuring assistance within 24 hours. Which was, politely, followed up with another automated reply, shoving me back to the customer care phone assistance, NOT GIVING ATTENTION TO THE CONTENTS OF MY E-MAIL!! So, I've wasted another 17 minutes waiting just now, with empty promises of solving the problem? I'm getting the impression that they psychologically attack their clients, hoping they will make a double payment "to keep their lines open."