Preservation Fund and Estate payout

My Father passed away in January 2021. He had investments with Old Mutual and to date we are struggling to get in contact with a dedicated person at OLD MUTUAL to assist with the transfer/payout of funds. The broker who initially did the investments is no longer a employee of Old Mutual and is unable to assist even though he did try. For such a big company I expected better service. Why must one complain first to try and get assistance with completion of documents required. You are giving the impression that we are just another number in your que and have no priority to finalise everything so that funds can get transfered and reinvested. Same apply to dividends that is due and transfer of shares. Surely it was also Old Mutual responsibility to see that there is a nominated beneficiary on investments and now you creating a excuse to say there was none after more than 20 years. Even if there was no beneficiary there is ways to determine who the beneficiary will be by way of marital status and lifetime spouse. Please I'm asking of you to be professional and resolve this problem as it's creating a delay on the estate.