Illegally Divorced Behind My Back

Hello all. I need help. Recently while looking for an upcoming court case I was searching through public documents online and found litigation that was brought against me 6 years ago. When I clicked on the link it stated my husband’s name vs. myself. As I kept reading I realized what the paper was telling me. As tears flowed from my eyes I realized that 6 years ago when I my husband and I was having a rough patch, he secretly somehow had me served and the court granted him the divorce since they could not reach me. There is one big problem. Him and I have been together for 22 years and living together for 14. How is it possible that I never saw this paperwork nor did I know that I was divorced!!! When I confronted him he admitted to it. I haven’t spoken to him since. That’s how my 2025 kicked off. Any advice is appreciated….????