BACS deactivated and customer made payment

A customer has attempted to make a purchase using direct transfer. BACS had been deactivated by my developer. I have since cancelled the order but what happens to the payment in the meantime?

Customer said the funds have left her account.

It was still on hold and I had changed it to processing before I cancelled it. It obviously won’t hit my bank account because the option wasn’t set up. Will it be refunded as I have cancelled the order? Or is there something else I need to do to make sure she gets her money back?

Thanks!