You took responsibility of being head admin of a ''major'' tournament, as admin you should work over getting that is needed to amend these fixtures. If you dont have time you shouldn't take that responsibility, and thats your own fault, because the tournament already started and there is no going back. I dont see such a rule in previous tournaments, judging by that you tried to make your work easier, ok thats fine but sometimes people forget to take screenshots. Since you're admin you have full access to the logs and if players arent able to show the screenshots, your job is to provide the needed proofs. Otherwise why you're here? Sorry but i can randomise teams and write it in threads =)