Wife not coming back to my home from Aug 2019 to till date

Due to our personal quarrel my wife left home with my 5 years old son on 24th Aug 2019 without informed me. Where she went i dont know at that time. After 2 days i seen her image status on whatsapp that she is with mom and dad at her uncle place. on 5th sept she wrote letter to my Bank that she is not part of my home loan and all her signature was fraud. Due to this reason my home loan disbursement stucks till date and i am having big financial crisis now, After 1 month I tried to call her but she didn't pick up my call. I sent msgs on whatsapp that "her aunt and uncle done her brain wash. So come back. i want my child back. His exam was on 7th oct 2019." She did complaint against me in police station that i am doing mentally torture to her. ACP called both and said "This type of complaints destroying both life and your children life, better meet both of you in some place and decide what do you want to do further" After two days recently her dad expired due to TB on 8-oct-19. She said i am responsible for all this event. Yesterday i went to her home for condolence, i met to my child at her home. But she didnt talked with me. Shall i send legal notice to her for coming back to home? suggestion?