It wouldn't even matter if the time was wrong (Wat not even having damage seems weird), as we don't even know this battle was the reason for the ban, or GAC cheating in general. CG has access to information we do not. Maybe there was cheating in CPit, or TW, or TB. Maybe they bought illegal crystals. Maybe they tried to sell their account or some other ToS violation. No one here can really defend OP or corroborate the ban, nor is it their job to do so. But people have merely pointed out, with a link OP provided, that there is at least one suspicious battle.