Cancel Dramacove Subscription

I subscribed to the streaming service Dramacove about three weeks ago using my email address, but I never received any confirmation email and have never been able to log in to the account since the first day. The application does not even offer a login page, which makes it impossible for me to access any account settings or manage the subscription. Even though I cannot use the service, Dramacove has already charged me three times, once per week, in the amount of US$31.99 each time, totalling US$95.97 so far. These charges appear on my Itaú bank card in Brazil, with the description related to Dramacove and the corresponding international tax. I have tried to contact Dramacove several times by email to cancel the subscription and to ask for help accessing my account, but I have not received any answer. I am requesting the immediate cancellation of this subscription, that no further charges be made to my card, and a full refund of all amounts already charged, as I have never been able to access or use the service.