Tamil Nadu Electricity Board [TNEB] — Door locked but EB bill of INR 410 generated

Address:

Nh3 Marai malai Nagar, Kanchipuram 603209

Consumer no. [protected]
I am in my native and my house is locked since Aug 2020, only fridge is on. All these months the bill generated was zero amount but bill amount for April 2021 -- INR 410 is generated. Please rectify and remove the amount from my bill.