MBD VODACOM - FULL OF ****!

MBD WHAT A LOAD OF BULL! Had a Vodacom contract years ago. Cleared and closed it. Years later boom! MBD claims I owe an amount. Cannot tell me what contract, the guy actually said I must tell him and I flipped. What **** is that? Where did this amount come from. I was never hounded for money . And suddenly out of the blue. Also, there has been a long time period between having this contract and them contacting me. Why the hell is Vodacom working with companies like this.They cannot even provide documentation, this is going to ICASA, and further.