Lingoda Charged Me €109 for Lessons I Never Authorized

I purchased a two-month Sprint German language course from Lingoda for February. On the payment screen, I clearly approved payment for the Sprint course only. Two months later, my course ended, but on March 15, Lingoda automatically purchased an additional package of 8 lessons for €109 and charged my account without my consent.

The email I received along with the invoice stated that I had a 14-day right of withdrawal and included a sample withdrawal form. Although I was understandably frustrated by the situation, I completed the form and submitted a cancellation request. However, Lingoda's response convinced me that they were not acting in good faith. They told me, "This is stated in your Sprint agreement, and you had the option to cancel one month in advance, but it is too late now." Yet I was never given the slightest notification or warning about this arrangement.

I simply cannot understand how Lingoda can automatically charge my account for a service that was never clearly disclosed on the payment screen or in the Sprint terms and conditions, that I never authorized, and that I was never informed about. Furthermore, the invoice is dated March 15, and my cancellation request was submitted within the 14-day withdrawal period. I have absolutely no intention of using these lessons. If Lingoda does not resolve this issue and compensate me for the unauthorized charge, I will not renew my Sprint membership and will consider taking legal action.