Bad service from Vodacom Fibre

I had/have Vodacom fibre line which I needed cancelled and when they billed me they said I out an outstanding balance of 19 months on a fibre line which I signed for month to month and their own agents have confirmed this. The area I moved to does not have Vodacom fibre hence my cancellation but why when I try to rectify the quote I been taken from one place to another and I do not understand why because this is a simple straight forward thing. So now I want all my accounts with Vodacom cancelled and deleted and my name be removed against them from the Experion.