Why even on 999 emergency calls does my phone not work?

[Mandyqks]

I'm frightened now because On calling 999 in recent life emergency a pop up says something like "CallApp contacts denied - (blah blah blah)" & call drops out. No call made! Today a financial emergency I rang my NATIONWIDE bank 0800 etc & same thing happened.
Please help.

 

[B. Diddy]

Welcome to Android Central! Moved from the Android Apps forum to the General Help forum, since the former is intended for developers to promote their apps.

Which phone and which carrier do you have? Are you in the US or another region of the world?