Unauthorized Itunes charge?

A charge of $0, another $0, and $0.88 showed up on my mother’s bank account from ITunes. The problem is she doesn’t have any Apple products nor does she subscribe to any nor have an Apple account. My mom and I both have different phones, I have an 8+ and she has a note 8. I do subscribe to Apple Music and other things through my Apple ID, but I do that with my own bank account. Since she doesn’t have anything to do with Apple at all, how come she has these random charges on her account? The only thing we have in common is AT & T. Should we be worried someone has her information?