November 2016 – Npower install a meter at property, taking out old pre-payment meter and switching us to economy 7 tariff. During this period I did not send off meter readings, and then in Feb 2017 Npower asked for a reading to be sent to them, but when looking notice that the meter is faulty and screen is broken.     Feb 2017 – Npower installs new meter.   May 2017 – First bill from Npower shows a sharp increase in billing, so called Npower to question the high bills