Vodacom billing (Admin)

I am tried of this vodacom, my invoicing is still not corrected, the amount that i am seening on my statement is not the amount due by me. Why do we have to go around in square circles? Can this be done correctly so i can move forward by doing business with you. I am getting no joy from no one. This was to be done by your account department. Sad as admin in any business have to be in order is there is no admin close your business.