I'd fight em and refuse to pay the extra on the bill. It's not your responsibility to fix their fuck-up when they are the ones estimating and billing you. If they want their money they shouldve given you the correct bill the first time. It's like getting a cheeseburger for $5, and then the restaurant realizes inflation exists and comes banging on your door for another $10 a month later.
Estimated bills are labeled as such, and directions are given for providing an updated amount. Also, since they tell you what the charge per unit is, there's nothing to stop you from doing the math yourself and sending more than the estimate in anticipation of the estimate being wrong.
I'd fight em and refuse to pay the extra on the bill. It's not your responsibility to fix their fuck-up when they are the ones estimating and billing you. If they want their money they shouldve given you the correct bill the first time. It's like getting a cheeseburger for $5, and then the restaurant realizes inflation exists and comes banging on your door for another $10 a month later.
You obviously are not responsible for paying for your electricity eh. That's not how it works.
Estimated bills are labeled as such, and directions are given for providing an updated amount. Also, since they tell you what the charge per unit is, there's nothing to stop you from doing the math yourself and sending more than the estimate in anticipation of the estimate being wrong.