Calcutta Electric Supply Corporation [CESC] — Very High bill from last 3 months

This is regarding Consumer no - [protected].
My electricity bill used to come around[protected] during summer and 800-1200 INR in winter in last 3-4 years apart from CESC charging high bill during oct-nov for no reason but Pujo.This year the bill is coming around 2500 INR when there is no AC used and even fans not used much due to pleasant weather.I am receiving 2000 + bill from last 3 months which is unreasonably high.Either they are making meters faulty or for some other reasons...this is unacceptable.I am planning to take this matter on court if this does not get resolved here.This is not just the case with me, I have collected similar stories from around 12 neighbors which makes my case really strong.