I didn't touch anything, nor reinstate anything.
yesterday, my ticket fare rules have been changed to non-refundable just like those reinstated bookings.
Today, the ticket is gone and can't be retrieved anymore.
And a big refund page appear instead. I believe now my refund is processed on their initiative.

For those who have their bookings reinstated, please check their tickets too. Because if the ticket numbers are the same, and the tickets have disappeared or been suspended, or removed, the booking code will not allow you to check in without a valid ticket.