Now do these things....
1. File a conspired police complaint against her and her all family members by alleging them that they have beaten ypu and your daughter and also threatened you and your daughter to kill...
2. File a permanent child custody case under guardianship and Wards act.
3. Divorce case against her.
After all this you could face some legal charges but don't worry you will not be arrested and at a stage they will come to compromise. At that time you can ask for whatever you want.