An unpaid seat is held for 30 minutes, and the email now says so

Yesterday's change held an unpaid online booking for 48 hours. That was not what was asked for — the instruction was to keep the 30 minute rule — and it is back to 30 minutes. The booking email now also tells the customer when their seat is released, which it never did.

Back to 30 minutes — an unpaid seat is held for half an hour, or until the deposit arrives.
The confirmation email names the deadline — it has always carried a payment button and never said there was a time limit. It now says when the seat goes back on sale, in your shop's local time.
No second email — there is no room for a reminder inside half an hour, and the release notice already tells them when the seat is gone.