Calcutta Electric Supply Corporation [CESC] — high billing amount

Address:

67A Sreedhar Roy Rod, 700039

Since last months i am receiving very high electricity bill from cesc kolkata. Actually we are using 1 fans & 1 led lights but the electric bills are coming above 810/month which is very much high than what it should be.
I have a doubt in my mind that either electric meter is not working properly or someone is doing electric theft from our meter as we are unable to check what exactly happening because the meter are locked in a room.
So request you to kindly look into it & resolve it as soon as possible.