Handed Over without knowledge

It puzzles me that a BIG company like Vodacom would act in this manner. Last year (cannot remember the exact dates), I completed my 24months and wanted to be moved back to prepaid. On my last month, I contacted Vodacom where the consultant informed me as to how much I would need to pay to finalize my 24months. <br> Two months later I received communication that I owe money. Upon questioning, I was taken from pillar to post. In January a consultant called me advising of money that is owed. I advised him of the discrepancy and he told me that he will get back to me regarding the matter. I never received any communication from Vodacom thereafter.<br> <br> On Saturday, 28-Mar-15 I received a Voice Recorded message from this number - 082 275 97. Advising that I have been handed over for defaulting in my payment. <br> <br> This is shocking as I have been with Vodacom for many many years, and yes I've defaulted in payment one two times in the 9 years but the previous 24months I've paid on time and in full.<br> <br> Please can I get a broader understanding of this matter as I am confused by the \Handed Over"part. Can someone give me an explanation to resolve this matter. My name is now on ITC......"""