Unprofessional and vex service

My late father was working for one of the security company, however due to his health condition he was forced to resign sometime in September/October 2021. Just after he has resigned a claim was then submitted to PSSPF for processing. PSSPF did what they seem to do best by dragging their feet until my father passed away on 16 November 2021. Following his death I informed PSSPF about the passing of my father and they requested me to submit supporting documents such as death certificate, DHA BI1663 and other documents which I did. Ever since then I did not hear a thing from PSSPF. Every time I follow up on the claim nobody bothers to acknowledge or respond to my emails. This conduct is very frustrating and unprofessional. Why is it so difficult for PSSPF to finalize this claim if all the documents were submitted and the member was up to date in terms of pension contributions.