Best answer by Eva_OVO
it sounds like your smart meter information hasn't been updated on your account, this can take up to 6 weeks after a smart meter has been installed. During this time your account should've been placed on "billing suspension", which stops statements being generated. This gives us enough time to change the meter details so you're not billed incorrectly.
We'll need to get this sorted, I'd recommend getting in touch with us over Facebook or Twitter with your name, DoB and account number. If you don't use social media, email firstname.lastname@example.org.