Starshort Unauthorized Charge After Subscription Cancellation

I recently discovered an unauthorized charge of 19.9 USD to Starshort on my bank statement dated Thursday, 3rd of September. I did not authorize this payment in any way. I had previously subscribed to the weekly VIP plan with Starshort using the email address annanoybe****@gmail.com, but I successfully cancelled this subscription on June 10th. When I contacted Starshort support, they stated that the charge was due to a technical issue. I then clearly asked whether a refund would be possible. Instead of answering this question or addressing the unauthorized payment properly, they only apologized, gave general explanations and offered me coins, which I did not request and do not accept as a solution. I request that Starshort immediately refunds the 19.9 USD that was charged without my authorization and permanently deletes all my data and everything related to me, including my saved payment information. I expect a clear written confirmation once the refund has been processed and my data and payment details have been fully removed from your systems.