Vodacom Blacklists you for owing R0.39 and don't inform you of outstanding money owed

Reporting somebody to a credit ratings agency, a year and a half after leaving Vodacom, for an oustanding balance of R0.39, and not even sending a notice of outstanding amount owed is unbelievably bad service. Even worse is the fact that the money was always collected via a debit order, so it's not that I forgot to pay, they made an incorrect deduction leaving me owing them money!