How to quash the ex parte order?

My husband’s secretary filed for divorce during the lockdown and subsequently obtained an ex parte order in his favor. Shockingly, I later discovered that he remarried another woman, and this revelation came a year and a half later, as I had been living in a different city for work. I never received any summons or notice regarding the divorce proceedings. I am utterly devastated and confused, especially since the appeal period was only 90 days. Now, I am considering several options: Should I file a petition to quash the ex parte order? If I win, who will be considered the legal wife—me or the other woman? What are the conditions under which I might lose, and if I do lose, what should my next steps be? I also want to express that I do not want a divorce; I simply want to be with my husband. Is there any possibility for that to happen?