Absolutely shocking energy supplier!

Absolutely shocking energy supplier!
We moved to GNE a year ago because 'apparently we would save money' moving to this supplier!
How ever I have had a issues starting in February 2020 and it has still not been resolved! They do not reply to emails until 5 days later, then they say because it's taken so long to reply I have to submit emails again because its 'been awhile" since the last email! There fault!.

Daryl jones