I'm afraid there's nothing you can do if you are the only player who reported them. Things are this way to prevent trolls from spamming fake reports.
If they actually reported you for harassment, don't worry. As long as you didn't harass them, you will be deemed innocent. If there is a report against you, then jurors will have access to logs from the whole game and if any of them feels like reading the whole game and notice the harassment (which is very likely to happen in this case, since they will read everything you said to check wheter you were guilty of HS/H or not) then the juror can duplicate the report for both of the harassers. After that, other jurors will judge those players. You only need one juror to duplicate the reports for that to happen.
edit: They reported you indeed.
https://blankmediagames.com/Trial/viewReport.php?id=3409047. I doubt you will be deemed guilty for that, but ultimately it's up to the jurors.