Purposeful delay in paying out provident fund and life insurance

I've been attempting to claim my father's life insurance policy for over 6 months. On several instances they have requested documents I had previously submitted. I have lodged complaints to no avail. I can only assume that they are purposefully stalling as feedback is only received a week or two after document submission with requests for new documents. I've followed up more times than i can count currently with no end in sight and no way forward.