Unable to debit my new bank account

This should have been a very simple process but has turned into a whole unnecessary situation. I changed banks in August and contacted all my debtors to inform them that they need to debit my new bank account from the end of August. Everyone else was able to do so successfully except for Cell C. I updated my bank account details with Cell C in Mid August and they didnt debit my account (the old one or the new one) I ensured sufficient funds were still in both accounts incase there was confusion with one of the debtors. I phoned last week to enquire what was going on and when they would be debiting my account for this month. I once again confirmed my new banking details with the consultant and she assured me that they would debit my account the following day as she has escalated the situation for me- she was unable to tell me why it hasnt been debited on the agreed date though. Its now 4 days later, my account still has not been debited and now they disconnected me today in the middle of my work day. I was very very unhappy. I phoned AGAIN tonight and spoke to yet another consultant who was unable to tell me why my account has still not been debited despite Cell C having my correct details. I confirmed this again and requested my account please be debited asap. She told me it will be debited tomorrow and my line will be reconnected asap. I am waiting now to see if this will happen, if not I am not sure who I have to beg to just take my money for this month? Why is it such a problem when every other debit order I have went through my new account without an issue but I have to keep phoning Cell C to please debit my account and still nothing. This is ridiculous, my line better be reconnected asap.