Horrible experience

I have submitted a death claim and every time I get a response it takes over 10 days for a reply and they keep asking for something different. The last email I got they sent a form to complete 4 pages and then asked for supporting documents, now a whole 3 weeks later they asking for page 9 of 9 which was never received to be completed before payment. This is so frustrating now I responded and will have to wait another 3 or more weeks for a reply for them to send the form they want signed an then submit and again another wait. I called the number but it doesnt go through, Terrible service