I have the same question
I want to login without facebook

Try submitting a support ticket via https://support.chess.com/customer/portal/emails/new

I had this problem also and now it is fixed. Just sent a ticket to chess.com staff.
Thank you, this was fixed long ago

i have asked REPEATEDLY to get chess.com off of my facebook account no response. any suggestions
You can disconnect it yourself, unless you created the account through Facebook.
https://support.chess.com/article/267-how-do-i-change-my-google-or-facebook-account
Hello staff,
I logged in via facebook at the very first time but now I don't want to login via facebook anymore. I want to keep the account but logging in using original username and password. Please help. Thank you in advance!