2025 Taxes - Need Info

As part of a divorce decree 45+ years ago, the judge ruled that my wife should be paid by direct deposit from her ex-spouse, every month on the 1st of each a certain amount. I am her current spouse for the last 33 years, however in the first part of June, my wife passed away. However she did receive a % of her ex's salary from January 1 until June 1, 2025 as directed as part of the divorce decree. She received her payment amount for June 1, but passed away on June 2, 2025. I've argued, in writing, with the company her ex works for numerous times that I just need some direction to the correct department or point person and contact information as the company has not sent a W2 to my deceased wife for Jan 1 to Jun 1, 2025. They said they don't deal with those types of questions, and basically refused to help direct me to obtain the info. What recourse do I have?