Debit order not run - again!!

How many times does Vodacom want to ***** up my account? In September, they debited me twice. I returned one debit order according to their instruction, and then they still wanted to charge me a penalty fee of R100 for returning the debit order. Eventually after three weeks, this was sorted and my debit order of R358-50 ran as normal on 20 October. In November, they failed to pass a debit order on my account. Upon enquiring with Portia at the accounts dept today 27/11/2015, she informs me that the debit order instruction was removed from my account as they did not have the authority to debit. I NEVER instructed them to stop processing the debit order! She then informs me that she will re-instate the debit order for December, but I will need to make a cash payment for this month. She has promised to send me the banking details, which I have still not received. When I asked her to read me the account number over the phone, she could not do this \as she does not know what it is"!! Well how do you expect me to make a payment then?? Please sort this out as I am so tired om fighting with Vodacom each month!"""