Dear Querist
you may file a criminal Writ petition against them before Delhi High Court or Allahabad High Court under Article 226 of Constitution of India read with section 482 of Cr.P.C.
Or you may file a criminal complaint U/s 97 of Cr.P.C. Before Magistrate in Delhi, the magistrate has power to issue Search warrant against them and directed to police to bring her in the court and when your wife appear before the court, her statement will be recorded by Magistrate and if she is willing to live with you then the court shall hand over her custody to you, otherwise as per wish of your wife.
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