No Feedback After several Emails and calls

My grandmother passed away on the 16th of Sept and I need to report her passing. I am also the beneficiary for her annuity fund in her will. I have sent various emails to [Email Removed] [Email Removed] and [Email Removed] but no response. I have called in various times to get the claim forms and I was told numerously that it will be sent within half an hour. It is a week now and I still do not know what documents you require from me so that we can start the claim process