Studocu Charged After Free Trial Cancellation, Refund Denied

I am writing regarding an issue with my Studocu subscription and an unauthorized charge despite a confirmed cancellation. On June 6th, 2026, I started a free trial and cancelled it the same day. I received an email from Studocu on June 6th confirming that my free trial had been cancelled. Despite this, on July 6th, 2026, I was charged 468 Mexican pesos for a subscription. My Studocu account is registered under the email address: hernan***perezlis***@gmail.com. After seeing the charge, I contacted Studocu customer support and also sent them a screenshot of the cancellation confirmation email. However, they told me that a total refund is not available and refused to refund the full amount, even though the cancellation was done on June 6th and the charge was made a month later, on July 6th. I request a full refund of the 468 Mexican pesos that were charged on July 6th, 2026, and for my subscription to be fully cancelled so that I am not charged again in the future. I expect this situation to be reviewed based on the documented cancellation confirmation and for the unjust charge to be reversed.