Billing issue

I am really disappointed in the Client Care for Vodacom. Every time I phoned, I need to re-explain my whole complaint to each consultant - they keep me on the line for 18+min to figure out what the situation is and then I get referred to the support team, who can only assist me in 7 working days. This is ridiculous, after 4 calls, I am still not assisted. I am being charged for a handset installment I did not apply for and they are not able to rectify this.