Facebook security check is broken and sends 5 digit code instead of 6

As the title suggests the security check has been sending a 5 digit code to my phone instead of a 6 digit one, which is not accepted. This has rendered my account unable to log in so I can't contact facebook. Its been like this for months, I was hoping they would fix it but if no-one can tell them about it then they probably don't even know

Without logging in I can't post in the help section or even send a message about the fault. Creating a fake profile doesn't work either as they close it down the moment I speak of another account. There is no way to pass the security check as even if I prove my identity by changing the password the same screen comes up straight after, also it does this on my phone, tablet and laptop so its not a devise problem

So 2 related questions

1. Is there a way to contact facebook without logging in
2. Has anyone else experienced this problem and solved it

I would like to have my account back before Christmas as a lot of people I know use it to make arrangements, although it seems like that may be unlikely

Any help welcome, thanks