Octopus Energy posted me a 321 A4 page electricity bill printed out on paper as a physical 5cm thick package (on their "Agile tariff" the rate changes every half hour, so there are 48 line items per day). I enquired as to why they'd done that?
Apparently they tried to email it first, but the 15 MB email exceeded my email server's size limit, so they posted a hard copy instead.
@tim But a random nearly £50 credit for electric dating back to September 2022 (!) was there! When our next Gas and Export come through, what's the betting they will still forget our electric usage, and I will have to remind them (in the meantime, our balance looks better, so I'm not worried).

@UkeleleEric
@tim

I had this when I had to keep asking them for a bill each month and the trick is, is you put them in a position where they'd have to hand you something known as a lock letter, which they will not want to do. as then you can complain to ofgem

So the question to ask them is," what do you have to do in order so that I don't have to ask you again?"

also just bypass ocotpus' support on email and email greg@octopus.energy and you'll be escalated to the top tier support.