I switched to them for a years fixed rate tariff ending Dec 2017 paying £71 a month. In August they credited me £40. I logged in to find out why to discover that the they had increased my monthly payment to £90, even though my fixed rate didn't end for 3 months AND they'd just credited me. I phoned to complain that I had not been notified of the increase and what was the reason for the increase. They said I was notified because it was on the website. A company this large should said an email, who logs on every week to check their account? How can they increase payments when it's fixed for a year? Why credit me back as well? They're a bunch of cowboys. Don't use.