This should be possible before your order goes out:
-- check if your order has been dispatched already
-- Log on to our website with your email and password
-- Find at the top of the screen the list of your Recent Orders
-- On the right of the current Order in question read its' Status.
If the Status is at Dispatched, then you are too late.
If the Status is at Finishing, then you may still be too late. But email us in case we can still catch it for you.