Landlord Harassment — unjust deduction of security deposit

Address:

560103

I live in bangalore, Sobha dream acres society as tenant to a person "Nitesh Gupta", who has deducted 20000 from my security deposit as arrears on non-payment of electricity bill for the year 2018, the flat has no electricity meter still he said he will cut 20000 with no valid proof of the said amount.
The electricity provided in the society is from builders themselves and he has failed to show any proof that the builders are charging from him in any way.