Fungi *****s your money!

My sister and I live in a 3 bedroom apartment which is powered by Fungi, we are living there for almost a year now and have been very happy till a month ago. Our May electricity bill came to R2000, which is an unexplainable increase in our normal monthly usage. We are in office 8 hours a day, at gym for another 2 hours a day everyday and in the month of May, we were not at home for a whole week, all plugs were turned off before we left other than the fridge and freezer of course. Now this month, we understand that it is winter and we are using heaters which will cause the bill to be slightly higher right. But to pay R3000 for just 12 days!?! That is absolute madness, we don't use the stove or oven often either. Somebody from Fungi needs to explain how the hell it is possible for 2 individuals (who are barely at home) to use R3000 worth of electricity in 12 DAYS!