*****ing from the dead

My husband passed away on 07/12/2017. Since 21/12/2017 I have been trying to get a credit due to me. Every time I ask about the refund I am told that they are working on it. I have supp**** all the legal documents such as death certificate etc. but this has not helped. Although it is a small amount it is the principle of the matter. I am horrified that when a loved one has passed away the remaining spouse is treated so badly.This has been such a traumatic experience.