Huge decrease in water supply. Getting over 1000 litres less on a R100. Pathetic customer service.

I live in a complex and from October this year I have been getting a ridiculously low amount. I have emailed them on numerous occasions requesting information as to why I'm getting so little litres when there isn't an increase in water this year. I only received 1 reply that was of no help to me as it never answered my question. 1 purchase in November went up a few 100 litres and immediately after it dropped drastically again. I have left my number for them to call me however they call. Their customer service is pathetic. We are the only prepaid users experiencing this problem so Citiq is robbing us of water that we are paying for.