CANNOT RECONCILE DEPOSITS

My account is not in arrears. It is not my fault Vodacom is unable to reconcile my payments. You will not force me onto a debit order again so that when I cancel my contract and keep debiting me for 2 months. I make my payments before the last day of the month as your Terms of Payment state. I am tired of getting vodacom's voice activated calls. Your robot can tell me I am arrears but since it does not respond to my voice how can I tell it I've paid? Based on your Ways to Pay when I pay by Internet I "simply log on to my bank's website, select vodacom as a beneficiary, insert my vodacom account number as my reference". Now if I am SIMPLY doing that, why am I in arrears? Why does your Ways to Pay not give me an email address for me to email my proof of payment to?