Bought my house in Aug 2014, had all sorts of problems over two year period only ended when I sold the property, and even then it went on for six more months, I even had the ombudsman involved for over a year to try and solve the issues but even they had only limited success. I feel if I had not sold the property I would still be in the nightmare that is npower !!!
After 59 years living on this planet npower are by far the worst company I have had the misfortune to be involved with.