Old mutual

My name is nono langa. I would li to lodge a complain concerning my late mother Johanna langa pension funds. She was a member of old mutual Superfund pension funds/Orion. My mother died 11/09/2013, I found out that she is a member recently 2021. When trying to lodge acomplain with old mutual, I was told that she was not a member, she's not appearing on the system, please help scheme no u000612d joined 01/01/2005 Employer Union catering registration no*** my contact ***