New information that came up at the interview caused your PR application to be refused? It must have been information that was considered negative?
I'm not 100% on what's on the go as if the immigration Officer said it's been rejected they should have notified you already. I would call the IRCC Call Centre and ask them to provide you with an update. Tell them that you had a interview and it was rejected but your online account still says it's in process 2 months after.