Poor Claims system

My father passed away on the 14/02/2018 and on the 19/02/2018 we claimed for his death policy's. My challenge is only one out of all the policy's paid and it only paid me and my mother out of 5 siblings. I 1st call on 12/02/2018 since the 15 days payment policy promise is over, I spoke to a guy buy the name of Daniel and he told me a communication was sent out and some documents r missing. then went back to the lady that was helping me at from the branch just to find out more but we could see that everything is the. On the 13/02/2018 i called the claims department again and spoke to a lady by the name of Zenesh and explained and she told me that everything is the and it normally takes 3 days for payments to reflect . I again called on the 15/02/2018 and spoke to Lucas who then explain everything properly, He said 3 of my siblings ID's are not legible, we both couldn't understand why because they didn't explain and i also told him that this copy's where made at the branch and at the same time as mine and my mothers but one of our policy paid out to us. He also said the Bank statements of 3 of my siblings bank statements are also not legible, that i also did not understand because they all where taken on the day of claim, all stamped from standard bank and one of my sister was taken from the same FNB ATM as me, but her claim was not paid. so i real don't understand if this is a way used by old mutual to delay payment or not to pay policy or what kind of statements and ID should we bring different from what we have.