Duolingo Keeps Trying to Charge My Card Without Permission

Even though I do not have any paid Duolingo subscription, I have been receiving text messages from my bank every morning and night for about a month stating that someone is attempting to charge approximately $19 to my card. The messages indicate that the payment attempts are from Duolingo but are being declined because my old card is still associated with the account.

Because of these repeated unauthorized payment attempts, I had my bank issue me a new card. However, I still have not received a clear explanation about why my old card continues to be targeted. The fact that payment attempts are being made every day for a subscription that I never authorized is deeply concerning from both a security and privacy standpoint.

I request that Duolingo immediately identify and cancel the unauthorized subscription associated with my payment information, ensure that no charges are collected from any of my accounts, and provide me with a clear written explanation regarding these repeated unauthorized billing attempts.