Water bill inappropriate

Good Day Since March, my water bill was terrible, we went into a lock down since the 26 of March I was alone in the unit, but the bill was still up even for Month April, now for the month of May its even once, when I call the Centurion offices no response or help and I did complain about this before but no help, Strange enough all this started when I change my electricity to prepaid, since then my water bill was high while I'm buying prepaid electricity, I tried several times to get help, but I'm not winning I don't have a garden, its a 1 floor unit, how can my water bill go to R850 without electricity, 2 bed unit, how is the water reading being calculated and we were on lock down, and since then my water bill its even more crazy Something its wrong here and I don't get any help, this is frustrating too much I changed to prepaid electricity so that I can only pay for water and I buy only prepaid electricity since I'm hardly in the house, but strange enough water bill its high, No water leakage in the toilet or Gersey, all this was checked when I first complained , but no response or assistance I got since then until today.