Vodacom - call centre incompetence

I complained in November about a problem regarding data charges and not receiving my invoice. The problem persists. On the one hand, Vodacom is harassing me on an hourly basis with calls about a small amount of R200 outstanding, whereas it has so far taken me 5 calls this week to NOT receive the itemised bill in question. My query has NOT been resolved! <br> <br> I have now been placed on hold by a call entre agent - for 12 minutes already!!!<br> <br> When will management take action and actually sort out a problem? Arlene Walsh