||Unfortunately this is not possible, by the rules always the latest submission counts. Next time please reserve a couple of hours before the end of the submission phase so that you can resubmit an earlier solution in this case. And even if it was allowed to revert now, the deadline for submitting systems for final testing is passed already.
You wrote 'our' and 'we', who are you referring to? As far as I know you did not register a team for the contest and you should have been competing on your own.