Opponent lawyer said 'No instructions from his client', judge wasting time in sending summons letter

Wife left me in 2013, and I am my family and relatives tried many efforts to bring her back, but she and her family were so adamant that our all efforts got wasted. They demanded money, gold and property as condition to come back with the condition that she will be free to go back to her maternal place anytime whenever she wish to. We did not agree with her demands. I asked her to come back without such demands, but failed. Finally, in April 2015 I filed RCR. In retaliation she filed 498a, section 10 HMA, and Section 125. But there is no progress in these cases as she or her lawyer don't appear in these cases after initial few hearings. I took back RCR and filed section 13 in 2015. 10000 p.m. Interim maintenance ordered, but she is not coming to take it. My evidences in divorce case are over/closed. she had been given 5 chances for her evidences, but she didn't come. On last chance, her lawyer said to the judge that he doesn't have any instructions from her. So Honorable judge sent her a letter by simple post to appear. she again didn't turn up and that letter also hasn't come back. On my request the Honorable Judge sent letter by registered post. Letter come back with a note that 'father said she is out of station'. Third time the Honorable Judge again sent letter with instructions that if this time door found locked, paste the notice on the door. But the letter or any report about it, has not come back even after almost 3 months over. Now the Judge has been transferred and a lady Judge has joined. She asked opponent's lawyer why she (my wife) is not appearing? Also she asked opponent's lawyer to ask her to appear. Her lawyer said, she is so much harrased, so doesn't want to continue and he has no contact with her, but he will try. On next hearing she again remained absent, so the Honorable Judge suggested to put the matter in the Lok Adalat and then asked my lawyer to send her a registered letter, informing her to present in the court. And if she still doesn't come then the Judge will proceed to the nest step. My apprehensions and questions are: What if she says in the later stage or after the ex-party decision that: 1. She had not been informed about the proceedings or any letter pasted at her home. 2. My address got changed. 3. Any other reasons. 1. Whether she can be informed by email, facebook messenger, facebook, or any other means? 2. Is there any judgements available about using digital and social media for sending summons and information? 3. Once appeared in the case, is it court's responsibility to send letters to appear, if someone is avoiding appearance? What may be the outcome of it? If you have any other advice for me, please tell.