Old Mutual should be shut down

My mother passed away earlier this year, and she had a portfolio with Old Mutual, to which my sister and I are the beneficiaries. I initialized the claims process more than 3 months ago, and only one out of the four policies has been paid out so far, which happened about a week ago. I contacted the broker to enquire about the remainder of the claim, and was told that the next one was being processed, and would take at least 15 working days to be finalized. And the rest?....no response. The broker reports that there is a huge backlog in the claims department, and if that is true, they are understaffed. Contacting the call center is just a waste of time, nobody there seems to know what is going on. Public opinion of Old Mutual is shocking, out of just over 16,000 reviews on this forum alone, more than 12,000 are written by disgruntled clients. Not that I really want to, but it seems that my only option is to go the legal route, and I will unless the claim is honoured within 30 days from now.