heeeeelp! lol

[Pandora]

We are with origin for both. Not that thats a recommendation.
Red Energy I have heard are a little cheaper. There is a webite where you can compare prices, you put in what your useage is and it tells you the best deals for you.

Google switchwise

When you get the reults, if you click on the company it tells you billing options on the left side, and ont he right it will say if you can pay by centrepay.

ETA: Red energy were the only ones that I could see used centrepay. However I do know with origin you can set up direct debit fortnightly, thats what we have.