Old Mutual financial institution

I'm helping my dad, who was supposed to receive a payment two weeks ago from old mutual as he's on pension right now. He has missed 3 car installments already on his car and hasn't been able to pay his funeral cover as a result of old mutual not processing his change of banking details now. He's been given the run around even though we've logged a complaint with the senior financial advisor who then referred us to the complaints department and had us type an email out. No one seems to be taking him seriously and it's affecting his health as well as he has sleepless nights and struggles to eat due to high stress levels.