Electricity @Coleman properties are ridiculously high

We have occupied a Flatlet @ Brackenvilla in brackenhurst on rental. 2 bedroom,1 bathroom. We use a Gas stove , Gas Kettle & Gas heater. Our Electricity bill is R2400 - R2900 per month. We queried with Coleman properties and they have a don't care attitude. The landlord sent an electrician out to do an inspection and found that we don't even consume that amount of Kw per day.