Been with them 2 years, ultimately they don’t control the actual Gas or Elec so you’re never going to go cold because of them, but we’ve had some issues.
Firstly, they cancelled my DD, they say I did, I say they did – my bank says they did, but they won’t admit they did, anyway, no biggie I thought, I’ll just pay them by card every month when I log my meter readings (they don’t seem to use agents to take them) – which I did, but the bills were growing quicker than my payments, it seems after the DD fiasco they changed my tariff because DD was a requirement of my original one so I dropped from the cheapest possible to a less-good one.
It was all sorted in the end, but it was a faf, still with them and just renewed for another 12 months.
Customer Service is best by e-mail, 4-24 hours to respond usually.