REPLACING A LOST TANZANIAN BIRTH CERTIFICATE

DOES ANYBODY KNOW HOW OR WHERE I CAN GO TO REPLACE MY TANZANIAN BIRTH CERTIFICATE THAT THE UK PASSPORT OFFICE HAVE LOST WHEN I SENT IT WITH A NEW UK PASSPORT APPLICATION?.

IF ANYBODY CAN HELP ME RESOLVE THIS MAJOR PROBLEM I WILL BE EXTREMELY GRATEFUL BECAUSE I AM DESPERATE TO GET A NEW ORIGINAL COPY.

I HAVE TRIED EVERYWHERE I CAN THINK OF WITH NO RESULTS

PLEASE REPLY AS SOON AS POSSIBLE TO berrylindseya@gmail.com

THANKS
LINDSEY A BERRY