Can't loggin becasue Facebook keeps requiring a code via mobile

Hello,

This morning when trying to log in to facebook it told me that they needed to verify my identity due to some suspicious activity. So they sent a code to my mobile. However a week ago I switched providers. I did not receive the text. A few minutes later I received an email saying that my phone number was deactivated on facebook for texts because my previous provider no longer recognized the number. Problem is now that I try to log in to facebook it always says I have to give them the code they are sending to my phone, but I am not getting any text. I haven't changed my phone number, just providers.

I am able to recover account and change password using facebook tools but again once I have changed the password I get to the same screen where they require the code and they say it's been sent to my mobile

So I am stuck. Help !!!!!