Unable to connect to Facebook due to a change.

Hello,

I'm completely desperate! I just changed my phone and since then, I can't connect via the Facebook app. I'm asked for a code that I’m supposed to receive on an authentication app (two-factor authentication), but I don’t have one.

My phone number and email address remain unchanged. When I click on "try another way," I'm asked to take a selfie and provide my contact email address; then I receive a code that allows me to take the selfie and send the identity verification request. Later, I receive an email with a password to log in but when I enter it, I have to enter a captcha code, and every time I get an error message (a problem has occurred).

I also received an email asking me to send them an ID, but they don't tell me where to send it.

I want to clarify that I was able to access Instagram (via app), WhatsApp, and also Facebook via a browser (on my new phone), and when I try to change the two-factor authentication (to use my phone number instead of an authentication app), I get a message saying "You cannot make this change at the moment."

Indeed, we noticed that you're using a device that you don't usually use and we need to ensure the security of your account. We will allow you to make this change after you have used this device for a certain amount of time."

Anyway, you understand, I'm desperate; I’ve had this account since 2008 and I care a lot about it...

If one of you could help me find a solution, I would be very grateful.

Thank you in advance to those who take the time to reply!