After a year and a half of trying to resolve a bill discrepancy, I finally gave in to Npower and paid an incorrect bill. I asked for the situation to be escalated, which they never did - They took the wrong meter reading for a different house and tried to charge me for nearly three times the amount we eventually settled on! How do you make such a colossal mistake like that? After approximately 30 calls (which I had to make to them) and generic, threatening letters in the post, I finally had to give in due to their incompetence. They are the worst, most revolting company I have ever had the displeasure to be involved with. I will never ever use them again and I cannot stress enough for anyone reading this, to take your custom elsewhere. I'm now using Spark who are fantastic all round.