Tamil Nadu Electricity Board [TNEB] — Electricity meter is dead(No display) but sending bill with random amount and units

Address:	Chennai, Tamil Nadu, 60091
Website:	www.tnebnet.org/awp

1) till 01/08/16, every thing is good and normal, I am paying EB bills using https://www.tnebnet.org/awp/. On average bill amount is Rs 100.
2) On 02/08/16, I have received bill by email normally, but i found something suspicious, All components including CC Charge is 'zero' but total amount is 114. I logged in to https://www.tnebnet.org/awp/ and found "DOOR LOCK" in Status. Its a small apartment and all electricity meters are in same place which is always accessible. Then i checked the meter and I found it dead(No display).
3) I have paid the bill on 03/08/16 and later registered a complaint using https://www.tnebnet.org/awp/ on 05/08/2016.
4) On 04/10/16, I have received bill by email again. This time bill details are showing status as "NORMAL", used units as 570 and Total Bill Amount as 856. I have verified the meter again it is in same state (No Display)
5) I have checked the complaint status using https://www.tnebnet.org/awp/. It is showing "Reply Given by AEE" as status, but i couldn't find any reply message.
6) I have paid bill to avoid disconnection and then visited EB office. They are refusing to take complaints. They are saying Owners only should come, Online complaints won't reach here, this is only way this branch operates, etc.
7) Again i received bill today 01/11/16 again. Now bill is showing, status is "NORMAL", Used Units are 470, Total Bill Amount is Rs 1040.

Q1) In case of dead meter why status and readings are random?
Q2) For the same case why first time status is 'DOOR LOCK', And from next time 'NORMAL' and random reading?
Q3) From where this random reading coming?
Q4) To inform about meter failures, should owner only visit EB office?
Q5) Will i get credit/refund from EB due to invalid random readings?
Q6) What happened to complaint I registered through https://www.tnebnet.org/awp/, Where and what is the "Reply Given by AEE"?