Yeah, they replied on Twitter that it was to make up for any arrears. So that payment was to cover my arrears. Since I was in credit, that wasn't correct.
When I challenged them on that via phone (after a 30 minute wait on hold) I was told that, oh, the direct debit stuff automatically transferred over when we took over Our Power's accounts. The fact that I had cancelled the OP one didn't mean I'd have cancelled the Utilita one. I told them I had cancelled my Our Power debit prior to them taking over two months prior and that the last time I had checked my bank account online (about two weeks prior to seeing this debit) there was no Utilita direct debit set up, and that one was set up well after I was no longer their customer. So someone had goofed.
I also told them that I had previously spoken to someone there who had said I'd get a final bill from OP and a final bill from Utilita, in paper form, with a complete accounting of charges. And that I'd told that person I had cancelled the direct debit, and yes, was told there would be no debits from either OP or Utilita. The guy said "well, I've just read the agent's notes and there is nothing in there about that."

I actually did get an apology out of them, with the caveat that "oh, someone should have notified you" that a direct debit was going to be set up. Yes, yes they should have! JHKeyrist....

The bank did refund the money immediately. I've looked at the OP final statement and they've estimated everything, even though I provided meter readings every month. (The gas charge is way under-estimated.) They don't have the correct service address for the electric. And there's no way to reach anyone about it as email bounces back from all the addresses listed on the bill, saying they've ceased trading. Any payments would be sent, according to that bill, to Utilita. Who could not explain how the charges were sorted, when I contacted them.
What. ever.
