Daylight *******, getting the highest bill in your absence.

Having to see money flushed down the drain because of inaccurate electricity readings is purely daylight *******. The previous week we bought electricity next morning lights were off we reasoned and thought it was the heater adjusted our usage... Friday we left checked the balance it was at 22 with only the fridge & wifii on. When arriving Sunday purchases electricity for R100 when checking it then says -88 okay I go and buy for R50 checking it says -153. So when checking the usage Friday is normal as it should but Saturday is higher then all the days where we were at home yet there was no one Saturday. Monday morning hardly 24 hours of purchasing the lights were off. We checked it said 153 and Sunday with high consumption, (How so if we only arrived late afternoon?).... I purchased for R100 with the last hoping the purchase will rectify and update correctly still no electricity. When checking we at -63!!! Still no electricity now... How do we get charged for days we were not home for even worse those days were higher than the days we at home????