Can’t log into old account. New account setup with none of my data.

Hi - looking for community help before contacting IMDB. I think I’ve lost my old account, with years of IMDB rating and lists due to the removal of Facebook login. I used to used FB login to access my IMDB account. And when I went through the process of trying to log in using my Amazon account details instead it seems I now have a fresh new IMDB account, which is NOT GOOD. Luckily I wrote down my old IMDB account user ID. Any advice on how to merge the accounts? Or just get access to my old one? Thx!