Question for British High Commission Ghana

MY MUM, JOSEPHINE ATALI, LIVED AND WORKED IN LONDON BETWEEN 2004 AND 2010 AS A NURSE. SHE FELL SICK AND CAME TO GHANA, BUT DIED TWO WEEKS AFTER HER ARRIVAL. NOW, MY QUESTION IS HOW DO I ACCESS HER NATIONAL INSURANCE CONTRIBUTION? BECAUSE, I LIVE IN GHANA.