I received a call about a week or so later in response to me cancelling it. Before verifying details, the guy on the other end of the phone had no details about my account other than my direct debit being cancelled, account being in debt, and claiming they’re not receiving meter readings.
The call came a week after a statement, which had actual readings, and I was logged in to my account and could see there was usage info up to the day before, and I had credit.
Once I verified myself as account holder, he could see they were getting readings, and my account had credit. He offered to set up the direct debit again and I turned him down, because at that point my payment was still being recalculated after I complained about the bad data used for the price hike. Told him I didn’t trust that it would be resolved in time for my next payment.
Was a good shout on my part, the payment recalculation changed nothing and it’s still suggesting the ridiculous amount.