Impact Meters billings are out of this world - Why do we have to suffer so much??

Can you tell me how you calculate the billing? I have just received the statement and is a ridiculous amount of money. I live alone and for one week I was away. How did you get this amount??? Please give me a detailed report, or is there something else you are billing that I am not aware of?? These estimations are wrong, you have to recalculate and send me the correct invoice.