Struggling to change billing account

I submitted a written letter with a request to change the billing account of my business phone to<br> My personal bank account, as I am not in business any more. This request was submitted<br> October 2014, but after 4 months and several visits to Vodacom Secunda as well as Vodacom Menlyn,<br> The matter is still not resolved and the amount is still deducted from my business bank account. The customer service lady at Secunda just say that the request was emailed to head office, and she cannot do anything else. I am really unhappy as I want to close the business account and is only keeping it open to make sure the Vodacom account is paid, costing me unnecessary monthly banking fees. <br>