Terrible service

Our dad died 20 odd years ago, our mother (his executor along with Syfrets which is now Nedbank) 10 years ago. A few years back we were contacted by OMUT to say he had shares and they needed to distribute. I have been pushed from pillar to post for over 3 years trying to cash in the shares and distribute to his beneficiaries as per his will. They won’t allow us without an Estate Late account and a new executor. We can’t get access to his estate late file from the master of the court as he died so long ago so can’t appoint a new executor. I have sent through death certificates, copies of wills et al and getting nowhere. I have been trying to resolve this for over 3 years. JSE are refusing to assist me, even Nedbank tried to assist. This isn’t your money OMUT!