On the Payments settings tab, enter the following information:
Post-order screen message fo free orders.
Example: 'Your order is waiting for confirmation. Wait for the operator to ring.'
The same message can be entered after making a paid order.
2. Set the Reject pending orders automatically after... checkbox.
3. Specify time - 1 minute.
4. Save it.
As a result, the client will create an order, and in a minute it will be in the Rejected status.
The time on the calendar will be free.
And you can go to the order and set the desired status.