1. File for Restitution of Conjugal Rights and the court will send notice to her last known address provided by you.
If the notice can't be served on her, give a public notice in local language along with English language newspapers.
2. Then if she does not respond to the RCR case, you may get ex-parte order in your favour.
3. Based on favourable order of RCR, if your wife does not join you, then her refusal to join you itself can be a very good ground for obtaining divorce from her.
4. Since she has abandoned you voluntarily, there may not be any need for you to pay her maintenance/alimony amount.
5. Based on her abandoning you in your marital life, on that ground, file for contested Divorce and since she may not going to attend divorce proceedings, inspite of repeated notices sent to her alongwith publishing of Public Notice in local language and English newspapers in her place, the Court may likely to grant you ex-parte divorce.