Pay my father's retirement annuity, it's been 4 months already

Old Mutual is not a company one should rely on. My father passed away in July 2022 and his retirement annuity hasn't been paid to the beneficiary which is my mother. When we call we always get an answer that the claim is escalated. What's worse is that two weeks ago it was at Tax directives and going for payment, all of a sudden they say there are outstanding documents of which were sent the very same day. Today when we call the claim is at Tax Directives again. This back and forth has been going on for 5 months now. Old mutual service is very bad and I am glad I cancelled my retirement annuity with them 🤞