Neglected customer

I am utterly disappointed with their services. I put in a case for my dad's death claim two years ago and up until this day I have not received the payments. Last here October they sent the documents to be released but we need it to be reviewed because we were not happy with the outcome and since then I have been the one calling and emailing to get feedback on the case. Few weeks ago they said they would release documents that will allow us to get the claim but they haven't delivered yet again.

I hope I can get some assistant soon.