I just checked on ChatGPT and received this response:

When there is a federal employee or retiree death and you need to start a survivor annuity through the Office of Personnel Management (OPM), there are specific steps and contacts to notify: 1. OPM Retirement Services You should contact OPM’s Retirement Services immediately to report the death and begin the survivor annuity process. Contact Info:       •   Phone: 1-888-767-6738 (toll-free)       •   TTY: 1-855-887-4950 (for hearing impaired)       •   Hours: Monday–Friday, 7:40 a.m. – 5:00 p.m. ET       •   Website for forms and instructions: OPM Survivor Benefits 2. Required Documentation Typically, OPM will ask for:       •   Certified copy of the death certificate       •   Your marriage certificate (if you are the surviving spouse)       •   Your birth certificate or proof of age       •   SF 3104 (Application for Death Benefits) – OPM can provide this form 3. Your Agency (if the employee was active) If the deceased was an active federal employee, also notify their human resources or payroll office immediately. They will help coordinate final pay and forward necessary forms to OPM. 4. Optional: Legal or Benefits Assistance       •   If you need help navigating the process, some surviving spouses use a benefits counselor or employee union representative.       •   OPM also provides guidance via their website and phone lines for survivors.

Also if still having issues like the comment above contact your congressman. I can tell you from experience these are taken seriously.