Hint App Charged Me Without My Knowledge or Any Confirmation

The app called Hint App has withdrawn money from my card without my consent, and I have no idea what this application even is.

There was no verification code, no approval request, no confirmation message — absolutely nothing. How can people be charged without authorization and left so easily victimized like this?

I will be filing official complaints about this incident, but I expect this issue to be resolved immediately and the unauthorized payment to be refunded to my account as soon as possible.