The worst of the worst Npower system to change the meters: I ordered Npower to change the billing meter to top up meters for GAS and Electricity. First takes one and half month to book the engineer to come with 5 phone calls, first three customer service said they done the booking, but 3 weeks later, no engineer came out to the appointment, wasted me half of day. Then I call them back, Npower said the staff did not call the gas meter team to book an engineer. I was like what????? Then, Npower gave me a phone number and told me to book a meter engineer by myself…….!!!!!!! So the meter guy came, changed the meter, I thought this is done. Then, I still receiving the bill from the Npower for the top up meter!!!! Then I phoned them again, after 10 more calls and complaint, it was because the meter guy did not report back to Npower with all the information regarding the old and new meter numbers and readings, so, that why Npower charging me double!!!! First, I am not the one to install the meter, second, I was not informed that I need to report back with all the information, but end up, I need to look for all the information and report back to Npower by myself, this is total waste of time, and some of the Npower staff is just rough and impolite. At the end Npower said they will update my top up meter within 90 days !!!!!!!!!! Don’t use Npower……..