Unauthorized ShortsWave Charges Continued After Cancellation

Some time ago I downloaded the ShortsWave app for a trial through the Apple App Store and later canceled the subscription through Apple. Despite this, ShortsWave has continued to charge me 17.99 per week. I first noticed these ongoing charges roughly two weeks after I believed the subscription had been canceled. Apple shows that my subscription is canceled, so I do not understand how ShortsWave is still able to bill me or how they obtained or retained my payment information in a way that allows these charges to continue. Because of these repeated unauthorized charges, I have had to cancel my debit card and obtain a new card number, which has caused me additional stress and inconvenience. I have already sent multiple emails to ShortsWave requesting that my account be canceled, but I have not received a clear resolution or written confirmation that my account is truly closed and that these charges will stop. I am requesting written confirmation that my ShortsWave account has been fully and permanently canceled, that all further billing has been stopped, and that my personal and payment data have been deleted from your systems. I also ask you to review and address the unauthorized charges that were taken after my cancellation through Apple.