Electricity Bill — getting higher electricity bills

Address:

Pune, Maharashtra, 411038

We are just 3 people in the house with the power used for fan, iron, washing machine. However we are getting a bill between 1900 to 2100 every month. Our other flat owners who use more appliances like a/c along with the above mentioned appliances do not get a bill more than 600 to 700. We really feel that there is some loop hole in our meter or our connected is misused. Any help is appreciated please...