The pledge manager for Nemesis Lockdown will be closing on the 1st of August at 8 PM CEST (please check what time that is in your time zone!). 
If you did not managed to finalize your pledge, there will be a chance to spend your credit on the post-production remaining copies after the shipments will end (though, be aware that not everything may be available at that point and the amount of copies will be limited to the ones that are remaining after the shipments).