Lack of customer service and bad service

I am a very disappointed and frustrated customer. I have been liaising with Old Mutual(unit trust department) since March 2021 following up on payment of a deceased persons. I have been sent from one person to the next without success. Old mutual consults were adamant that monies were paid into the estate account, they even sent proof of emails, which was not true. They apologized and advised that this will be sorted out, 8 months later, I’m still chasing for payment. I am sure the deceased would not have invested their funds with old mutual had they known it was going to take this long for their beneficiaries to be paid out. Emails are never acknowledged, phone calls never picked up. I have been left with no other option but to utilize this platform, if this does not work. I certainly will be taking this to social media and let it trend.