Unauthorized Charge by Hint App and No Clear Way to Cancel

Money was withdrawn from my account by the Hint App, and I am requesting that my membership be canceled immediately. A payment of 650 TL (approximately $15 USD) was taken from my account without any prior notice or information provided to me. I want my subscription to be canceled.
It appears that the same thing has happened to many people. If anyone knows how to cancel this subscription, please help.



