Even i am in the same boat. But the amount of Rs.7970 you stated is for single month ? Usually EB bills are bi-monthly.
Even in my case, the bill amount and the units have doubled. They came and checked my meter and told that the meter is working fine based on the calculation they arrived at that time of their visit. I even showed bill for 3 years and they are not ready to accept that.
If meter is not working, they just take the average of any 2 bi-monthly period which has the highest value and ask you to pay.
In my case they say that i have to pay the amount as the meter is found to be working fine based on the calculation for the last 10 days.
Please advice what to do in this case.