E.ON owns poer generation in GB as as well as in Europe. E.ON Next with GB domestic customers is assigned renewable fuel mix so E.ON sells it dirty energy for cheap in long term deal twith Utility Warehouse to push through it's MLM model
E.ON Next use Kraken IT plaform by Octopus Tech. So it gets monthly billing.
Like many Energy companies, several Facebook groups have sprung up, where customer help each, but like many groups on FB beware of scammers or just that whose interests are not your own. While there can be good advice there can also be plenty of misinformation