What can I do if my parents are forcing me to take a divorce from my h

My girlfriend asked me to convert me to Islam from Hindu to convince her strict parents about marriage. I did this out of my will in order to marry her. But her parents still didn't agree & made divorce forcibly as per Islamic law immediately. They have bit of political connections, my family is not beside me and my job profile has her name as wife. Her parents have also snatched all my papers of conversion and i have few photos only regarding my conversion. It happened 6 months ago. We both love each other but her parents kept her locked, so no contact. We both are adult and are not in prohibited relationship. What legal steps I can avail now to get her back? Can i file any case in kolkata high court directly? Help plz