Thank you very much khairulaizat92 for taking your time to reply.
I posted this question here because it said that ESET has integrated scanner in the facebook (when I was trying to scan my fb account with ESET social media scanner).
I contacted the Facebook support team first thing when the page was hacked, but they haven't responded till now and I doubt they will respond in future. They do not have any form to fill up to reclaim or report the page too.
These are the pages that are hacked:
https://www.facebook.com/AbdulKalamFanClub/
https://www.facebook.com/inspiringyoungindian/
https://www.facebook.com/TheVivekanandaFanClub/
Now they created a page called Life inspiration and are sharing their things on my page.
I have a feeling that someone hired a hacker to take over my page.
The pages had 6 Million fans in total and it had taken me 8 years to build those pages. So I'm fighting to get it back.
One question I have is, if I create a new page and start building it, what are the chances of it getting hacked? Should I delete my facebook account completely and create a new one so that if there are any data of my profile with the hackers gets deleted.