Vodacom Worst Service Ever

Vodacom worst service ever! Vodacom Direct activated an open contract on my name without permission after I requested to change to prepaid. Vodacom submitted a debit order almost 5 times my normal amount. I had to reverse the debit order at my bank. I have been to a local branch of Vodacom more than 6 times since Nov 2018. Vodacom cannot provide the voice recording in which they claim that I had requested an open contract. Will definitely be changing service providers if the problem does not get resolved.