How can I legally recover my money?

A girl, in the context of marriage, took a substantial amount of money from me in multiple installments, claiming that her mother was ill and that she needed to pay her college fees, among other reasons. All the payments were made through UPI or NEFT. Later, I found out that she was already married. I now want to know how I can recover my money, as she is not willing to issue any cheque or sign a promissory note. As evidence, apart from bank transaction records, I also have our chats and call recordings. How should I proceed, and what are my chances of recovery? Can she file any false allegations against me? I have never been physical with her and have rarely visited her home. She is from the North East and lives alone.