Charge for itemised billing without my consent

Dear Vodacom, I am glad that you think my previous complaint was resolved, however, I have tried numerous times to contact you to inform that you completely ignored the one part of my complaint! I was charged over R20 for an email of itemised billing yet the call centre agent never made me aware of these charges and when I queried this he said he will lodge it with accounts and yet my bill still reflects this amount...I find it very unfair to be charged for something without being made aware of this - every time I have to deal with your customer service I end up being disappointed in your service and wondering why I chose to stick with your network...Please investigate this urgently and provide me with proper feedback...I have been waiting for over 20 days to hear from you regarding this!