My wife is sending my son to BMC school even after his name is already in convent school

Hello Sir, my son is around 5 years old. last year he completed jr.KG from St.paul high school and got promoted to Sr.KG and I have payed fees for his books etc.. a month back me and my wife had a big argument post which she was sent to her mothers place. Child was staying 2 days in week with me and 4-5 days with her. His school reopened on 18th of june. during that time the child was with her. We called them to request that from tommorrow his school is reopening and so please start sending him to school or send him here and we will manage the same. Suddenly, her father started talking rudely and said that we are not going to send the child unless u all come and take both of them i.e, my wife and the son. Now, they r not sending him school since past 10 days. i came to know from their relative that she is sending the child to BMC school. However, his name is already there in ST paul convent school. I dont know how can she be stupid. Now i want to get my child back. Please suggest can i forcefully get my child back to my place?