ShortMax - Watch Dramas & Show Cancellation And Refund

I have been repeatedly billed by ShortMax despite cancelling my subscription in the way they instructed. On 23 May I cancelled through the App Store as directed in their instructions and, in addition, I went onto the ShortMax website and cancelled there as well. Even though I completed the cancellation in both places, ShortMax has continued to charge me 19.99 dollars on a weekly basis. These charges have been taken every week after 23 May without my consent, even though my subscription should already be cancelled, and they are still continuing to this day. Because of these ongoing and unauthorized payments, my account has also incurred overdraft and extra fees. I request that my subscription be fully cancelled immediately so that all further weekly charges are stopped at once. I ask that all weekly payments taken since 23 May be refunded to me, as I followed ShortMax’s own cancellation instructions and have still been billed. I also request that all overdraft or extra fees caused by these repeated charges be refunded. Finally, I ask for a written confirmation that my subscription is cancelled and that no further payments will be taken from my account.