Deplorable service at Old Mutual

In 2017 my mother passed away and she had left a few policies with some insurance companies. Since then my sibling and I have claimed from the other insurance companies without any issues. The only policy that was left to claim from was Old Mutual. I started the claim process in February this year and to date the claim is nowhere near completion. I have lost count on how many complaints I have sent in with regards to the poor communication from the staff. The latest let down is from their complaints department where I received an apologetic in tone e-mail from one agent by the name of Leslie Maart but clearly that email was just as insincere as poor as the service is because in the email she promised to email back a copy of the document I had asked for in 3-5 working days. I still have not received the document or even heard back from her and today being the 8th if not 9th day since her last correspondence. I have even sent a follow up email and she does not see the need to even respond to my email. I am at my wits end with Old Mutual, getting a response from any of them is like drawing blood from stone and I was under the impression that the complaints department would give better service than their claims department but is seems I was wrong because poor customer service is part of the company culture. I would never recommend Old Mutual to anyone for anything. It is absolutely disgusting how they have treated me and cannot wait to wrap up my dealings with them so I never have to say that name again.