Refusing to assist

I am not happy at all with Vodacom and their agents. I have been trying to get hold of a settlement letter so that I can settle the debt I owe through a financial company but instead the agents are rude and they are sending me to one department to another. they can only send an invoice of which that is not what i want. They do not listen to understand and are quick to respond. I have been in conference call with them and the financial company but they cannot assist. Vodacom accounts and legal needs to do better.