2 bed flat - full electric - which supplier should I go for?

Hi,

I moved in to a new flat about a month ago - 2 bed, all electric, well wrapped, 10 years old building. I am single, working professional, so will be at home evenings and weekends.

I found out that the current supplier is Scottish Power, so was planning to stay with them. I tried to get new tariff through uSwitch but was rejected by Scottish Power twice because of totally silly reasons (and lost like 3 weeks because of that). After conversation over the phone, they promised to come back to me on Friday with new offer, obviously they didn't so bye bye Scottish Power and I don't want to see you again.

The question is which company should I go for? I can see nice offer from Bulb, Octopus Energy, EDF Energy and eON. The thing is that Bulb and Octopus have got like 9.5/10 score all over the internet, when EDF and eON like 0.5-1/10. What is that? There can't be such massive difference between them and I have got a feeling that someone is buying fake reviews here...

Thanks in advance!