Tenant — Overcharging of Landlord

I was staying in a room located in rajaji street, mahatma gandhi nagar, taramani, ch-113 from 11.7.2018 to 1.31.2021/ due to Corona we (3 people - 2 of them left on March 22nd and i left from room on Apr 4th) moved to home town on 4.4.2020. but we kept our belongings in room. So we paid full rental amount during these period with EB charge rs.7 per unit. We asked house owner we are not there why we have to pay EB, he said that's for Veranda light (we stayed in 1st floor and owner is in Ground floor). And we informed him to vacate the room (i mean to vacate our things and hand over the room to them) on Feb 2nd week at Jan beginning but he has deducted the advance amount for Feb month too. Note: at Corona time i lost my job but still we paid our rent without delay. But he didn't reduce rent and didnt give our advance amount properly as he agreed

He has one Common EB service for all 5 houses with sub-meter and he has common water motor too.

Here I've attached the message he sent to me for reg- Rent, EB, water details as he charged to us. We sent the rental amount through online banking to his bank account on or before 5th of every month.

Also I've attached his EB service card. Pls review these and take necessary action to these greedy house owners.