New account

Hello and help.
I have a new bulb account, not had for a month yet but my usage shows higher than my payment,
Why is this,?
I have only given 1 reading so far,

Hello and help. I have a new bulb account, not had for a month yet but my usage shows higher than my payment, Why is this,? I have only given 1 reading so far,

It will be based on an estimated annual energy usage (converted to £’s and divided by 12). It will become more accurate as you submit more monthly meter readings…