My ratings history was lost after my facebook login was disabled by IMDB

I was informed by IMDB that my login must be changed because of the IMDB-Facebook relationship was over.  I followed the instructions but when I logged in with my email address it doesn't show my watchlist and even worse, my ratings history was reduced from more than a thousand ratings (more than 20 years as a IMDB user) to just 5, one from yesterday and the other ones from movies years ago.

What to do to recover my ratings history???