Blatant imcompetence

Vodacom is now charging me an amount of R381.99 which they claim to be subscription services for September! I paid out the balance of my contract on the 25th of Aug 2015. I then converted my number to prepaid which conversion Vodacom finally effected on the 9th of September 2015. It took another 2 months for Vodacom to unblock my phone which they had blacklisted unbeknown to me. Having been sent from pillar to post by Vodacom for 2 months I had to blast them on hello peter for them to assist me. Now Vodacom is billing me for September an amount of R381.99 when (1) I did not have a contract with them but was a prepaid customer and (2) I did not have access to their network as they had restricted same. Are you for real Vodacom? I've now spent yet another 1 month trying to have this billing issue corrected by Vodacom and yet again Vodacom is sending me from pillar to post. I spoke to a Robin on the 12/10/2015 on their *** number who assured me that this will be sorted out in 2 weeks. More than 2 weeks later I've had to call Vodacom only to be told by yet another *********** agent that sorry I have no record of you last query. Hayi man Vodacon nitheni?! Sort this out and soon