Calcutta Electric Supply Corporation [CESC] — huge bill

Address:

43 danesh sheikh lane, Howrah, West Bengal, 711109

Sir,
My customer id is [protected], residing 43 danesh sheikh lane, howrah 711109. Every month i get excess bill though my electric consumption was not that much, we don't have any 24 hrs running electronic devices, nor we have 24 hrs running lights or fans, so how it will be possible that our bill amount is 2600? Please come to our address and check