Tamil Nadu Electricity Board [TNEB] — Meter Reading and defective meter

My current consumption charges has been calculated on average basis since the meter is defective as per the Assistant Engineer, TNEB.
The digits in the meter are visible except for the last digit.
The concerned officer is not accepting this and average has been taken and i will be paying Rs.2000/- more and this average will continue till the meter is replaced.
Why should the consumer suffer because of the inefficiency of the department.
when the digits are visible why the department is not accepting.
I have taken photographs and sent thru whats app and personally visited the TNEB office and shown.