NO RESPONSE REGARDING INCORRECT BILLING

I have a debit order that goes off my account every month, set up by you. In January, you sent me a bill that did not reflect the payment that you deducted - after numerous emails I eventually received the correct statement. Now you have deducted the incorrect amount from my account again (short by roughly R200) and I received a message saying that I need to make payment. This means that I would need to take time out of my day to go to a bank or into a store to do so. This was your error why should I have to be inconvenienced? My husband contacted your customer care and told them as much - this was 10 days ago. We have since sent another 3 emails and are yet to receive a response to any of them. Shocking service once again from Vodacom.