Unrealistic prepaid metering

Suddenly Stss is saying that I am using 1 kWh about every hour since the late evening of 19/03/2020. The 1 kWh escalates to enormous values when I actually use the geyser or oven. For example, my geyser was on for less than 1 hour and Stss recorded 44kWh usage. Logged the issue on 21/03/2020 but will only receive feedback on Monday. In the meanwhile, my Stss balance will decrease at an unrealistic rate.