Took me a long while to find who provided the energy after buying flat, otherwise would have swapped provider straight away. Then many hours on phone, being cut off, being on hold, and emails sorting out proof of ownership...partly ignored emails with readings but managed to set me up on app with estimates ( also they apparently can't read your previous emails when you phone unless you send it there and then) and their ridiculous demands for money. They "calculated" I owed them over £940 (2 months empty/just renovating it, 2 months living there). Guy on phone said we can read the metre remotely, not true. We worked out all the units etc and contested and bill was just £140. They gave me £20 'goodwill gesture' on complaining. They say no standing charge but rate is high for first units each month. Not good if you're a low user. Glad to see the back of them with their lies and terrible customer service and app is not user friendly compared to Octopus which is so simple.