Service Suspended!

<p> Every month Vodacom send me an automated message requesting me to enter the date on which I will settle my account. This system has worked very well until this morning. I wake up to a suspended service when I try to make a call. No warning from Vodacom. It took me 25 minutes to speak to a Consultant and then I was transferred to another department which was a further 5 minutes. I was told by the Consultant that I owe an arrears amount plus the current installment. Why did Vodacom not let me know? Why no warning? Why do this to a well established customer with a history of successful payments? I upgraded my cell phone and it appears the arrears originates from this despite the fact that I have paid against every Invoice. I am curious as to where this arrears has come from. Also the consultant gave me a sketchy breakdown of my contract and it certainly appears that I'm paying for a whole lot of add ons that I definitely did not sign up for. This was because my goal was to keep the upgraded contract below R500! It now seems its into the R600's. Could Vodacom kindly explain? </p>