Bad Service

My late father had shares with Yizani in the 1999's. My mother and I have been battling with this institute since 2020 for these shares to be released to my father's executor, Absa. Up until now, Yizani has not responded to Absa's request and the situation is beyond frustrating! It cannot take nearly 3 years for Yizani to action a request and more people should be warned about this huge waiting period for such a small amount of shares. Can this be looked into URGENTLY please by someone who can actually assist us?