Connexion with facebook

I came back to codingame to try to learn a different language and its impossible to connect with facebook anymore, which is the account where i had all my progress so far.
The error message says the dev are aware of the issue.
I just wanted to have a sense of when (if) the issue might be fixed and if there is a feature to kinda merge 2 accounts to not loose any progress i make to this current account OR recover the progress i made on the other account and transfer it on this one.