Facebook Login Issues? Can't access my account, because of my phone number?

[LStgo]

I was trying to access my account, but I can't. I've recently changed my phone number and I forgot to switch it in the security area on Facebook. Since I know I should attach a proper document (I already submitted my driver's license covering the personal info) to prove my identity. Where am I suppose to send it? I reply the email with all the info previous mentioned & also another one provided in the help center, however there is not a specific email to send it. I haven't receive anything and their phone number doesn't work. The only thing I received was this as a help guide with not enough answers: https://www.facebook.com/help/183256078471165/?ref=cr WHAT AM I SUPPOSE TO DO?