Parental controls

Help,

my daughter has an iPad. I connected it to my Apple id since she is too young for an email. I had it set up with parental controls. She went to visit her grandparents in another state. I have them the passcode to my Apple account so she could download a free game. Either she was told the password and remembers it or they aren’t paying attention to what she is asking to download but she is now making purchases. How can I change a subscription from my iPhone that’s on her iPad.

I already changed the password so she can’t download anymore items.