The Diamond Bill

I have a problem with my water and the increase in refuse bill ( refuse increased from 41 to 115, which when I check the increase is suppose to be 3% and not that ridiculous amount) that I escalated and emailed till date never got a response, sent more than 4 emails . I can't be paying R500 to R300 in water bills while I stay alone the only thing I do is shower once a day and the water is always lukewarm.I need my water bill and refuse bill to be investigated and rectified and a corrected immediately.