Male Child custody having age 5 years

Hi I am father of 5 year old son.I am working in a Software MNC company and my wife is also working in different Software MNC company. My marriage solemnized in Nov2015. In july 2020 during lockdown we have arguments and as per his father instruction over phone call she called police. After some counselling from police officer she left for the parental home with my 3 year old son and his father. This was the big shock to us and we both parties have no talk ,chit chat for next 9-10 months.After 9-10 months we have some panchyat platform discussion more than 4 times till jan 2022.Last panchayt got succuss for compromise. But after compromise i got the information from other source that my wife had already applied ICT (intra company transfer to same country or different country).Due to that on 12thFeb2022 company proceed the request and depute her in UK London.When i discuss her ,she told me that the visa is only for three months but when i checked her documents VISA was of 3 years. I asked her about that but she had no reply. After that she left for UK London on 20feb2022. As i am working from home so on 24thFeb2022 i bring my son from her parental home. Now on 1st march 2022 her father came to snatched the kid from us due to that our family taken the help from police. Police asked us to file the attempt to kidnapping case against him but to maintain the relation we had not did that. On 7thMarch2022 my wife came back from UK London to her parental home and on 8thMarch2022 morning time (7.30 am) she and her father with 2 unknown persons came and snatched the kid from our house. After that at 9am she filed a complaint against me and my parents in police station. Allegation- 1.Domestic violence (She claimed that on 7thmarch2022 she directly came to matrimonial house at 11 pm and whole night she and son humiliated. She also claimed malfunctioning as well) 2.Dowery 3.Kid kidnapping 4.Create obstacle in job 5.Seprate application -Child should be in her custody at London UK. After multiple counselling she refused to settle the things and finally case is in court since 31 march 2022 and she left son to her parental home and reached back to London UK again. .Domestic violence case is separately filed by them so its proceeding is going on. I also filed a case child custody and proceeding is going on. I studied "Child act law" ,everywhere mother is given more preference as guardian. So in this case what are the key points to consider and suggestion to me so that i can win the child custody case? FYI-They are using Vikram Vohra VS Shalini Bhalla case judgment to send child to another country. In this case husband and wife were divorced. We are not separated ,married till date. Please help me out with some suggestion.