Could you submit a support request with the details of the jam (including a link to the jam) and why you need rating specific information. Please send the email using the email address that owns the account which owns the jam.
For detecting fraudulent activity, we can review the votes received. We have access to more information about accounts that we can not share with any end-user. Please make sure to reveal any info you might have if you already suspect some accounts.
Reply to me here with the ticket ID so I can look it up to confirm.
Thanks