Harassment by Wife

We found a match through Matrimonial site, for my son, who till recently served as scientist at Sydney Australia. My son is 30 years old. The Girl was 20 years of age, simple 12th Pass,worked as Air Hostess, till we first met ( She left job, prior to our meeting). Her family history is complicated, parents got divorced, when she was young and her mother got married, when she was 8 years old. She used to live,shuttled at Granny Place ( Saint at Brahmkumari, Dwarka), Mamma ( Pitampura) and Massi (Jewellers residing at Dwarka), so our family felt, girl being lonely and uncared, my son thought with our family love, she will adjust. Her family showed us their inability for proper marriage, So on 24/10/18 my son went for simple marriage at got registered at court. We did't took any gifts, not even a single penny. Her parents also did't gave their daughter any gold etc. What she had, is jewellery given to her by us. After marriage, the Girl started behaving weird. She started fighting with my, shouting loudly, abusing him and getting physical- tearing shirt, scratching face etc. She even tried to self inflict injury using plastic diya. Her Mother and Massi supports her and has taken her home, on three occasions. She is insisting my son to leave us and live seperately. She disrespects us and calls us by name.We have audio clips of her while talking to her mother, abusing us and my son. We have accidently came to phone audio clips, of her talking to her Mother and Massi, asking her to bring all jewellery given by us, to them. We find her asking her parents to remarry her. It is clear they married for money. One audio clip shows her mother saying that they will not give divorce and will ruin my son life. We went for a family trip to Himachal, recently but after 3 days she insisted on returning back after having argument with my son. She threatned my son to jump off cliff, if we did't return immediately. we returned back. She abused us and made mockery of our relations. Her mother was constantly in her touch, asking us to immediately return back. Recently, She got into argument with my son and shouted loudly in public at night, abusing my son and our family. She took off her Mangal Sutra and Churra and said she wanted divorce. On her mother insistance, she calmed down and wore that again. We have become laughing stock in our locality On 31/12/18 evening, she left our home, with all our jewellery, on trival issue to attend her cousin birthday at Taj, Dwarka. There is no communications now. I came to know that my daughter in law, went into depression and underwent treatment for it during her job, at Jaipur. Also, in 2016, while staying at her Nanni House, she drank "All Out" and was hospitalized at Balaji Hospital and her step father was interrogated for it. My son is very disturbed and could't concentrate on his job, his employer terminated him for continued abstention. He is here in India, jobless and demoralized by this develpment. Please help us