2,000+ ratings gone

​Hello, I've been a user of IMDB for over a decade. I had more than 2,000 ratings. Now all are gone, except for 9 new ones I just put in. I used to use the Facebook login button, but now that is gone. I suspect its gone because Amazon does not want to play well with Facebook. All fine, but how do I recover my historical ratings data? Please help! This is a HUGE problem for me! I use IMDB all the time!​