Tamil Nadu Electricity Board [TNEB] — Wrong meter reading & More billing

Respected sir/madam, I am single resident at Manapakkam area (SC no [protected]). Usually my flat gets electricity bill up to 500/- max. and also unit consumption up to 300 only. All of sudden this month (19th May-21) I got bill of 6334/- which is very high and shown units as 1190nos. which is impossible to consume.
Please note that we don't have AC, no wash machine etc. Also am not staying from May1st onwards in the flat.
It is clear that this bill is not taken with actual units consumed, refer image attached. We cannot afford such heavy amount like this.
Request to check and update the bill with actual units and provide revised bill at the earliest. Need your help in this regard.

Thanks,
Vamsi Krishna