Billed high water usage with no explanation

I was billed for high water usage for two months difference of + -81kl. Ekurhuleni couldn't explain when I went to there Nigel branch in Jan'15. All they expected is I will pay the bill and that's it. Logged complaint on the web site 1Oct received mail complaint is logged successful and forwarded to the call centre 2 Oct so they could assist with the query. I Followed up on 6 Oct again mail was forwarded this time to *** to assist with the unresolved query, until today I haven't had an reply or anything from anyone!!! NICE CUSTOMER SERVICE